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  • Extracting numeric value from output of a uder defined aggregate in netezza using bash script

    - by Ankit
    I am executing a shell script to execute my user defined aggregate which is taking inputs yavg=nzsql -c 'select avg(x) from Input1' which is giving output like this AVG ---------- 2.000000 (1 row) I want to pass only the numeric(double) value which is 2.0000(where xavg is expected) from this to S4(x,y,$xavg,$yavg) where x and y are the whole column from table Input1, xavg=nzsql -c 'select avg(y) from Input1' Below is my InputTable.txt which is a text file from which I am popluating my "Input1" table in the shell script. 1 2 3 2 1 2 3 2 1 nzsql -c 'create table Input1(x integer, y integer, v integer)' nzload -t Input1 -df InputTable.txt nzsql -c 'select * from Input1 yavg=`nzsql -c 'select avg(x) from Input1'` xavg=`nzsql -c 'select avg(y) from Input1' nzsql -c 'select S4(x,y,$xavg,$yavg) from test' Below is the output : xavg := AVG ---------- 2.000000 (1 row) yavg := AVG ---------- 1.666667 (1 row) and i am passing this value to S4(x,y,$xavg,$yavg) which is a User defined aggregate

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  • Reading ResultSet from multiple threads

    - by superdario
    Hello, In the database, I have a definition table that is read from the application once upon starting. This definition table rarely changes, so it makes sense to read it once and restart the application every time it changes. However, after the table is read (put into a ResultSet), it will be read by multiple handlers running in their own threads. How do you suggest to accomplish this? My idea was to populate a CachedRowSet, and then create a copy of this set (through the createCopy() method) for each handler every time a new request comes. Do you think this is wise? Does this offer a good performance? Thanks.

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  • Browser gets blocked, workers to the rescue?

    - by tb_selleo
    Hello, I use JavaScript for rendering 20 tables of 100 rows each. The data for each table is provided by controller as JSON. Each table is split into section that have "totals" and have some other JavaScript logic code. Some totals are outside of the table itself. As a result JavaScript blocks browser for a couple of seconds (especially in IE6) :( I was consideting to use http://code.google.com/p/jsworker/, however Google Gears Workers (I guess workers in general) will not allow me to make changes to DOM at the worker code, and also it seems to me that I can not use jQuery inside jsworker worker code. (Maybe I am wrong here?). This issue seems to be fundamental to the JavaScript coding practice, can you share with me your thoughts how to approach it?

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  • I DISTINCTly hate MySQL (help building a query)

    - by Alex Mcp
    This is staight forward I believe: I have a table with 30,000 rows. When I SELECT DISTINCT 'location' FROM myTable it returns 21,000 rows, about what I'd expect, but it only returns that one column. What I want is to move those to a new table, but the whole row for each match. My best guess is something like SELECT * from (SELECT DISTINCT 'location' FROM myTable) or something like that, but it says I have a vague syntax error. Is there a good way to grab the rest of each DISTINCT row and move it to a new table all in one go?

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  • Mysql query - problem with order by

    - by Sergio
    I'm using two tables for selecting messages between users. Table "messages" for recording the messages and table "members" for checking users data (are they activ or deleted). This query working fine. What I need to do is list the received messsages order by last received. I tried to do with "ORDER BY messages.id DESC" at the end of this query but it didn't work. All messages are listed from first received. This is the mysql join table query that I'm using: sql = "select distinct messages.fromid, messages.readed, messages.fromid, messages.toid, members.id as pid From messages Inner Join members on members.id = messages.fromid Where messages.toid = ".$mid." AND members.status = 7 AND messages.kreaded !='1' AND messages.subject != 'readed' GROUP BY fromid" Is there any way to do this?

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  • Optimizing MySQL statement with lot of count(row) an sum(row+row2)...

    - by Zombies
    I need to use InnoDB storage engine on a table with about 1mil or so records in it at any given time. It has records being inserted to it at a very fast rate, which are then dropped within a few days, maybe a week. The ping table has about a million rows, whereas the website table only about 10,000. My statement is this: select url from website ws, ping pi where ws.idproxy = pi.idproxy and pi.entrytime > curdate() - 3 and contentping+tcpping is not null group by url having sum(contentping+tcpping)/(count(*)-count(errortype)) < 500 and count(*) > 3 and count(errortype)/count(*) < .15 order by sum(contentping+tcpping)/(count(*)-count(errortype)) asc; I added an index on entrytime, yet no dice. Can anyone throw me a bone as to what I should consider to look into for basic optimization of this query. The result set is only like 200 rows, so I'm not getting killed there.

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  • Oracle SQL Update query takes days to update

    - by B Senthil Kumar
    I am trying to update a record in the target table based on the record coming in from source. For instance, if the incoming record is present in the target table I would update them in the target else I would simply insert. I have over one million records in my source while my target has 46 million records. The target table is partitioned based on calendar key. I implement this whole logic using Informatica. I find that the Informatica code is perfectly fine looking at the Informatica session log but its in the update it takes long time (more than 5 days to update one million records). Any suggestions as to what can be done on the scenario to improve the performance?

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  • modalpopupextender.Show() wont fire

    - by Peter Lea
    I'm pretty new to developing for the web so bare with me. I have a company page with multiple locations and emails etc at each of these addresses. The idea is to have a single modalpopup to edit each type of data (one for email, one for urls, one for addresses etc). I link the modalpopupextender to a hiddenbutton and then call an edit function from various places where I can populate some hiddenfields and textboxes in the panel before showing it. The code executes but it just wont show the damn popup, I just see a flash and can't figure out if its my panel, my css or something I don't understand about ajax and postbacks etc. Things i've tried after reading various threads: Disable smart navigation in web.config Move ToolKitScriptManager up to master page and use proxy in content set hiddenbutton to use style="display:none" tried links etc instead of hidden button Heres my code CSS .modalBackground { position: absolute; z-index: 100; top: 0px; left: 0px; background-color: #000; filter: alpha(opacity=60); -moz-opacity: 0.6; opacity: 0.6; } .modalPopup { background-color: #FFD; border-width: 3px; border-style: solid; border-color: gray; padding: 3px;} Asp/html <ajaxToolkit:ModalPopupExtender runat="server" ID="mpe_email" BackgroundCssClass="modalBackground" PopupControlID="modal_email" CancelControlID="btn_cancel_email" TargetControlID="fake_btn_email" /> <asp:Button ID="fake_btn_email" runat="server" Text="email" style="display:none;" /> <asp:panel id="modal_email" runat="server" class="modalPopup" Width="500px" Height="500px"> <asp:HiddenField ID="hf_modal_email_location_id" runat="server" Value="" /> <asp:HiddenField ID="hf_modal_email_contact_id" runat="server" Value="" /> <asp:HiddenField ID="hf_modal_email_comms_id" runat="server" Value="" /> <table width="100%"> <tr> <td> <asp:Label ID="lbl_mpe_email_title" runat="server" Text="Edit Email Address" /> </td> </tr> <tr> <td> <table width="100%"> <tr> <td width="40px"><img src="../images/email.png" height="30px" width="30px"/></td> <td> <table width="100px"> <tr> <td><span>Quick Ref: <asp:TextBox ID="txb_mpe_email_qref" runat="server" Text="" /></span></td> </tr> <tr> <td><span>Email Address: <asp:TextBox ID="txb_mpe_email_address_full" runat="server" Text="" /></span></td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td width="40px" align="left"><asp:Button ID="btn_cancel_email" runat="server" Text="Cancel"/></td> <td align="right"><asp:Button ID="btn_save_email" runat="server" Text="Save" OnCommand="save_modal_email" /></td> </tr> <tr> <td colspan="2" align="right"><asp:Label ID="lbl_mpe_email_err" runat="server" Text="" /></td> </tr> </table> c# public void oloc_ocon_email_edit(object sender, RepeaterCommandEventArgs e) { switch (e.CommandName) { case "edit": hf_modal_email_location_id.Value = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_location_id")).Value; hf_modal_email_contact_id.Value = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_contact_id")).Value; hf_modal_email_comms_id.Value = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_comms_id")).Value; lbl_mpe_email_title.Text = "Edit Email Address"; txb_mpe_email_qref.Text = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_qref")).Value; txb_mpe_email_address_full.Text = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_email_full")).Value; lbl_mpe_email_err.Text = ""; mpe_email.Show(); break; case "new": hf_modal_email_location_id.Value = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_location_id_p")).Value; hf_modal_email_contact_id.Value = ((HiddenField)e.Item.FindControl("hf_oloc_ocon_emails_contact_id_p")).Value; hf_modal_email_comms_id.Value = "0"; lbl_mpe_email_title.Text = "New Email Address"; txb_mpe_email_qref.Text = ""; txb_mpe_email_address_full.Text = ""; lbl_mpe_email_err.Text = ""; mpe_email.Show(); break; } } Stuff makes so much more sense in a desktop environment, I hope someone can point me in the right direction. Thanks

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  • on click checkbox set input attr

    - by Tommy Arnold
    html form with 4 columns the first 2 columns are the sizes inside input boxes with disabled ='disabled', when they click radio button to select a size a checkbox appears, when they click that checkbox I would like to change the class and disabled attr of the inputs on that table row to allow them to edit the input box <table width="388" border="1" id="product1"> <tr> <td width="100">Width</td> <td width="100">Height</td> <td width="48">Price</td> <td width="65">Select</td> </tr> <tr> <td><input type="text" disabled='disabled'value="200"/><span> CMS</span></td> <td><input disabled='disabled'type="text" value="500"/><span> CMS</span></td> <td>£50.00</td> <td><input type="radio" name="product1" value="size1" /> Customise<input type="checkbox" name="custom[size1]" class="custombox" value="1"/></td> </tr> <tr> <td>200</td> <td>1000</td> <td>£100.00</td> <td><input type="radio" name="product1" value="size2" /> Customise<input disabled='disabled' type="checkbox" name="custom[size2]" class="custombox" value="1"/></td> </tr> <tr> <td>200</td> <td>1500</td> <td>£150</td> <td><input type="radio" name="product1" value="size3" /> Customise<input type="checkbox" name="custom[size3]" class="custombox" value="1"/></td> </tr> </table> <table width="288" border="1" id="product2"> <tr> <td width="72">Width</td> <td width="75">Height</td> <td width="48">Price</td> <td width="65">&nbsp;</td> </tr> <tr> <td>200</td> <td>500</td> <td>£50.00</td> <td><input type="radio" name="product2" value="size1" /> Customise<input type="checkbox" name="custom[size1]" class="custombox" value="1"/></td> </tr> <tr> <td>200</td> <td>1000</td> <td>£100.00</td> <td><input type="radio" name="product2" value="size2" /> Customise<input type="checkbox" name="custom[size2]" class="custombox" value="1"/></td> </tr> <tr> <td>200</td> <td>1500</td> <td>£150</td> <td><input type="radio" name="product2" value="size3" /> Customise<input type="checkbox" name="custom[size3]" class="custombox" value="1"/></td> </tr> <table> CSS input[type=checkbox] { display: none; } input[type=checkbox].shown { display: inline; } input .edit{ border:1px solid red; } input[disabled='disabled'] { border:0px; width:60px; padding:5px; float:left; background:#fff; } span{float:left; width:30px; padding:5px;} Jquery $("body :checkbox").hide(); // The most obvious way is to set radio-button click handlers for each table separatly: $("#product1 :radio").click(function() { $("#product1 :checkbox").hide(); $("#product1 .cbox").hide(); $(this).parent().children(":checkbox").show(); $(this).parent().children(".cbox").show(); }); $("#product2 :radio").click(function() { $("#product2 :checkbox").hide(); $("#product2 .cbox").hide(); $(this).parent().children(":checkbox").show(); $(this).parent().children(".cbox").show(); }); This is what I thought but its not working $("#product1 :checkbox").click(function(){ $(this).parent("tr").children("td :input").attr('disabled',''); $(this).parent("tr").children("td :input").toggleClass(edit); }); $("#product2 :checkbox").click(function(){ $(this).parent("tr").children("td :input").attr('disabled',''); $(this).parent("tr").children("td :input").toggleClass(edit); }); Thanks in advance for any help.

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  • How to join nearly identical several queries into one?

    - by Devyn
    Hi, Assume I have an order_dummy table where order_dummy_id, order_id, user_id, book_id, author_id are stored. You may complain the logic of my table but I somehow need to do it that way. I want to execute following queries. SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 AND book_id = 1 ORDER BY `order_dummy_id` DESC LIMIT 1 SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 AND book_id = 2 ORDER BY `order_dummy_id` DESC LIMIT 1 SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 AND book_id = 3 ORDER BY `order_dummy_id` DESC LIMIT 1 Please keep in mind that several numbers of same book is included in one order. Therefore, I list order_dummy_id by descending and limit 1 so only LATEST ORDER of A BOOK is shown. But my goal is to show other books in that way in one table. I used group by like this ... SELECT * FROM order_dummy WHERE order_id = 1 AND user_id = 1 GROUP BY book_id but it only shows order_dummy_id with ascending result. I have no idea anymore. Looking forward your kindness help!

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  • MySQL load data null values

    - by SP1
    Hello, I have a file that can contain from 3 to 4 columns of numerical values which are separated by comma. Empty fields are defined with the exception when they are at the end of the row: 1,2,3,4,5 1,2,3,,5 1,2,3 The following table was created in MySQL: +-------+--------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+--------+------+-----+---------+-------+ | one | int(1) | YES | | NULL | | | two | int(1) | YES | | NULL | | | three | int(1) | YES | | NULL | | | four | int(1) | YES | | NULL | | | five | int(1) | YES | | NULL | | +-------+--------+------+-----+---------+-------+ I am trying to load the data using MySQL LOAD command: load data infile '/tmp/testdata.txt' into table moo fields terminated by "," lines terminated by "\n"; The resulting table: +------+------+-------+------+------+ | one | two | three | four | five | +------+------+-------+------+------+ | 1 | 2 | 3 | 4 | 5 | | 1 | 2 | 3 | 0 | 0 | | 1 | 2 | 3 | NULL | NULL | +------+------+-------+------+------+ The problem lies with the fact that when a field is empty in the raw data and is not defined, MySQL for some reason does not use the columns default value (which is NULL) and uses zero. NULL is used correctly when the field is missing alltogether. Unfortunately, I have to be able to distinguish between NULL and 0 at this stage so any help would be appreciated. Thanks S.

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  • javascript getting complete code of element when mouseover or onclick

    - by oimoim
    Hi, How can I get the complete html code of the element i'm mouseovering or clicking ? Using document.onmouseover = function(e){ can I get the full underlying html code of the element which triggered the event ? Right now, I am able to get the tag name or id or whatever. What I would like is the whole code. For example; if I'm mouseovering a table, I would like to get the string : <table><tr><td></td></tr></table> Is this possible ?

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  • Use different updatetargetid based on view

    - by Jerrie Pelser
    I have a web page which display a list of items in a HTML table. Above the list is a form which allows the user to add a new item to the list via AJAX (using Ajax.BeginForm). When the data is posted to the controller via AJAX I add the new item to the database backend and generate a new table row via a Partial View which then gets appended to the exisiting table. When the form to add new items however contains errors, I want to render the form back to the web browser and display that. So here is the question: Is it possible to specify the UpdateTargetId from within the controller? At the moment whatever View I return from the controller gets inserted in the same target, but I would like to update a different target (ie. different UpdateTargetId) based on whatever view was returned from the controller. Any help would be appreciated...

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  • @OneToOne and @JoinColumn, auto delete null entity , doable?

    - by smallufo
    I have two Entities , with the following JPA annotations : @Entity @Table(name = "Owner") public class Owner implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id") private long id; @OneToOne(fetch=FetchType.EAGER , cascade=CascadeType.ALL) @JoinColumn(name="Data_id") private Data Data; } @Entity @Table(name = "Data") public class Data implements Serializable { @Id private long id; } Owner and Data has one-to-one mapping , the owning side is Owner. The problem occurs when I execute : owner.setData(null) ; ownerDao.update(owner) ; The "Owner" table's Data_id becomes null , that's correct. But the "Data" row is not deleted automatically. I have to write another DataDao , and another service layer to wrap the two actions ( ownerDao.update(owner) ; dataDao.delete(data); ) Is it possible to make a data row automatically deleted when the owning Owner set it to null ?

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  • Best performance approach to history mechanism?

    - by Royi Namir
    We are going to create History Mechanism for our changes in DB (DART in pic) via Triggers. we have 600 tables. Each record that will be changed - the trigger will insert the deleted one into XXX. regarding to the XXX : option 1 : clone each table in "Dart" DB and each table now will have a "sister table" e.g. : Table1 will have Table1_History problems : we will have 1200 tables programmer can do mistakes by working on wrong tables... option 2 : make a new DB (DART_2005 in pic) and the history tables will be there option 3 : use linked server which stores the Db which will contain the history tables. question : 1) which option gives the best performance ( I guess 3 is not - but is it 1 or 2 or same ?) 2) Does option 2 is acting like "linked server" ( in queries we will need to select from both DB's...) 3) What is the best practice approach ?

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  • mysql ignores not null constraint?

    - by Marga Keuvelaar
    I have created a table with NOT NULL constraints on some columns in MySQL. Then in PHP I wrote a script to insert data, with an insert query. When I omit one of the NOT NULL columns in this insert statement I would expect an error message from MySQL, and I would expect my script to fail. Instead, MySQL inserts empty strings in the NOT NULL fields. In other omitted fields the data is NULL, which is fine. Could someone tell me what I did wrong here? I'm using this table: CREATE TABLE IF NOT EXISTS tblCustomers ( cust_id int(11) NOT NULL AUTO_INCREMENT, custname varchar(50) NOT NULL, company varchar(50), phone varchar(50), email varchar(50) NOT NULL, country varchar(50) NOT NULL, ... date_added timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (cust_id) ) ; And this insert statement: $sql = "INSERT INTO tblCustomers (custname,company) VALUES ('".$customerName."','".$_POST["CustomerCompany"]."')"; $res = mysqli_query($mysqli, $sql);

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  • Sql select rows containing part of string.

    - by Maxim
    Hello! I want to write a comparation procedure (t-sql) for site seo. I have a table with field 'url' (nvarchar()) that contain a part of site url's. Ex: 'mysyte.com/?id=2'. Also this table for each url contains metadata, that i need to extract. The main problem is that full url on site looks like 'mysyte.com/?id=2&region=0&page=1', and i just need to ignore everething, except url in table: I mean: 'mysyte.com/?id=2' = is a part of 'mysyte.com/?id=2&region=0&page=1'

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  • Intime and OutTime for the Modified date

    - by Jash
    Question is already posted on June 4, but still am not get the Proper answer Again Table Structure: T_Person – Table 1 CARDNO 168 471 488 247 519 518 331 240 518 386 441 331 T_Cardevent – Table 2 CARDEVENTDATE CARDEVENTTIME 20090225 163932 20090225 164630 20090225 165027 20090225 165137 20090225 165147 20090225 165715 20090225 165749 20090303 162059 20090303 162723 20090303 155029 20090303 155707 20090303 162824 Query SELECT CARDNO, CARDEVENTDATE, (1000000 * CAST (CARDEVENTDATE AS BIGINT) + CAST (CARDEVENTTIME AS BIGINT) - 30001) / 1000000 AS CardEvenDateAdjusted, CARDEVENTTIME FROM T_CARDEVENT WHERE (CARDEVENTDATE > 20090601) GROUP BY CARDNO, CARDEVENTDATE, CARDEVENTTIME, (1000000 * CAST(CARDEVENTDATE AS BIGINT) + CAST(CARDEVENTTIME AS BIGINT) - 30001) / 1000000 ORDER BY CARDNO, CARDEVENDATEADJUSTED From this above query date is displaying correctly according to that time 03:00:01 to 03:00:00 How can I get min (time) and Max (time) for the adjusted date? I need the sql query for the above condition. Help me? Urgent Please

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  • Pros and cons of sorting data in DB?

    - by Roman
    Let's assume I have a table with field of type VARCHAR. And I need to get data from that table sorted alphabetically by that field. What is the best way (for performance): add sort by field to the SQL-query or sort the data when it's already fetched? I'm using Java (with Hibernate), but I can't tell anything about DB engine. It could be any popular relational database (like MySQL or MS Sql Server or Oracle or HSQL DB or any other). The amount of records in table can vary greatly but let's assume there are 5k records.

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  • Access data of a XSL file from a JSF...

    - by Asela
    Hi all, I'm having 2 simple XML & XSL files as follows. form_1.xml <?xml version="1.0" encoding="windows-1252"?> <?xml-stylesheet type="text/xsl" href="form_1.xsl"?> <myform> </myform> form_1.xsl <?xml version="1.0" encoding="windows-1252"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="myform"> <html> <body> <form> <div align="center"> <h2>My first form in XSL</h2> <table cellspacing="1" cellpadding="1"> <tr> <td>First name : </td> <td> <input type="text"></input> </td> </tr> <tr> <td>Last name : </td> <td> <input type="text"></input> </td> </tr> <tr> <td>Address : </td> <td> <input type="text"></input> </td> </tr> </table> </div> </form> </body> </html> </xsl:template> </xsl:stylesheet> Now I have a JSF file where I have embeded the form_1.xml file inside an iFrame. Inside my JSF, I have submit & reset buttons as follows. myJsf.xhtml <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:utils="http://java.sun.com/jsf/composite/utils"> <h:head> <title>::: The form filler application :::</title> <link href="./css/styles.css" rel="stylesheet" type="text/css" /> </h:head> <h:body> <div align="center"> <table cellspacing="2" cellpadding="2"> <tr> <th class="title">&nbsp; My form filler &nbsp;</th> </tr> </table> <br /> <fieldset><legend>Fill appropriate data in the following form</legend> <h:form> <div align="center"> <table> <tr> <td colspan="2"><iframe src="form_1.xml" frameborder="0" width="500px" height="500px"></iframe></td> </tr> <tr></tr> <tr> <td align="right"><h:commandButton value="Save data" action="#{myManagedBean.printValuesEnteredInTheForm}" /></td> <td align="left"><h:commandButton type="reset" value="Clear" /></td> </tr> </table> </div> </h:form></fieldset> </div> </h:body> </html> Now my question is that upon clicking the Submit button in my JSF, how do I access the values which I have entered in the XSL file? Any help is greatly appreciated. Thanks in advance. Reagrds, Asela.

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  • select from varchar2 column with numeric value sometimes gives invalid number error

    - by Rene
    I'm trying to understand why, on some systems, I get an invalid number error message when I'm trying to select a value from a varchar2 column while on other systems I don't get the error while doing the exact same thing. The table is something like this: ID Column_1 Column_2 1 V text 2 D 1 3 D 2 4 D 3 and a query: select ID from table where column_1='D' and column_2 = :some_number_value :some_number_value is always numeric but can be null. We've fixed the query: select ID from table where column_1='D' and column_2 = to_char(:some_number_value) This original query runs fine on most systems but on some systems gives an "invalid number" error. The question is why? Why does it work on most systems and not on some?

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  • How to add columns to sqlite3 python?

    - by user291071
    I know this is simple but I can't get it working! I have no probs with insert,update or select commands, Lets say I have a dictionary and I want to populate a table with the column names in the dictionary what is wrong with my one line where I add a column? ##create con = sqlite3.connect('linksauthor.db') c = con.cursor() c.execute('''create table linksauthor (links text)''') con.commit() c.close() ##populate author columns allauthors={'joe':1,'bla':2,'mo':3} con = sqlite3.connect('linksauthor.db') c = con.cursor() for author in allauthors: print author print type(author) c.execute("alter table linksauthor add column '%s' 'float'")%author ##what is wrong here? con.commit() c.close()

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  • RODBC sqlSave and column names

    - by waanders
    I've a question about using sqlSave. How maps RODBC data in the data frame to the database table columns? If I've a table with columns X and Y and a data frame with columns X and Y, RODBC puts X into X and Y into Y (I found out by trail-and-error). But can I explicitly tell R how to map data.frame columns to database table columns, like put A in X and B in Y. I'm rather new to R and think the RODBC manual is a bit cryptic. Nor can I find an example on the internet.

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  • Mysql - Grouping the result based on a mathematical operation and SUM() function

    - by SpikETidE
    Hi all... I'm having the following two tables... Table : room_type type_id type_name no_of_rooms max_guests rate 1 Type 1 15 2 1254 2 Type 2 10 1 3025 Table : reservation reservation_id start_date end_date room_type booked_rooms 1 2010-04-12 2010-04-15 1 8 2 2010-04-12 2010-04-15 1 2 Now... I have this query SELECT type_id, type_name FROM room_type WHERE id NOT IN (SELECT room_type FROM reservation WHERE start_date >= '$start_date' AND end_date <= '$end_date') What the query does is it selects the rooms that are not booked between the start date and end date. Also, as you can see from the reservation table, we also have 'number of rooms booked between the two dates' factor also... I need to add this 'no.of booked rooms between the two dates' factor also in to the query... The query should return the type of rooms for which at least one room is free between the two dates. I worked out the logic but just can't represent it as a query....! How will you do this...? Thanks for your suggestions..!

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  • How to Select Multiple Records from Multiple Tables at Once - SQL Server/C#/.NET/T-SQL

    - by peace
    I have two tables Customer and CustomerPhone. Customer usually has multiple phone numbers, so when i run select statement on customer 101, i will get multiple records due to the multiple phone numbers. As you see below all the "Phone" and "Fax" field belongs to CustomerPhone table. These are considered as two records in the CustomerPhone table whereas the rest of fields relate to Customer table which is a single record. What should i do to fill Phone and Fax field in this case? Should i run select statement on CustomerPhone first and then run select statement on Customer?

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