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  • Which is more efficient in mysql, a big join or multiple queries of single table?

    - by Tom Greenpoint
    I have a mysql database like this Post – 500,000 rows (Postid,Userid) Photo – 200,000 rows (Photoid,Postid) About 50,000 posts have photos, average 4 each, most posts do not have photos. I need to get a feed of all posts with photos for a userid, average 50 posts each. Which approach would be more efficient? 1: Big Join select * from post left join photo on post.postid=photo.postid where post.userid=123 2: Multiple queries select * from post where userid=123 while (loop through rows) { select * from photo where postid=row[postid] }

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  • Using XSLT, how can I produce a table with elements at the position of the the node's attributes?

    - by Dr. Sbaitso
    Given the following XML: <items> <item> <name>A</name> <address>0</address> <start>0</start> <size>2</size> </item> <item> <name>B</name> <address>1</address> <start>2</start> <size>4</size> </item> <item> <name>C</name> <address>2</address> <start>5</start> <size>2</size> </item> </items> I want to generate the following output including colspan's +---------+------+------+------+------+------+------+------+------+ | Address | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | +---------+------+------+------+------+------+------+------+------+ | 0 | | | | | | | A | +---------+------+------+------+------+------+------+------+------+ | 1 | | | B | | | +---------+------+------+------+------+------+------+------+------+ | 2 | | C | | | | | | +---------+------+------+------+------+------+------+------+------+ | 3 | | | | | | | | | +---------+------+------+------+------+------+------+------+------+ I think I would be able to accomplish this with a mutable xslt variable, but alas, there's no such thing. Is it even possible? How?

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  • Saving Data to Relational Database (Entity Framework)

    - by sheefy
    I'm having a little bit of trouble saving data to a database. Basically, I have a main table that has associations to other tables (Example Below). Tbl_Listing ID UserID - Associated to ID in User Table CategoryID - Associated to ID in Category Table LevelID - Associated to ID in Level Table. Name Address Normally, it's easy for me to add data to the DB (using Entity Framework). However, I'm not sure how to add data to the fields with associations. The numerous ID fields just need to hold an int value that corresponds with the ID in the associated table. For example; when I try to access the column in the following manner I get a "Object reference not set to an instance of an object." error. Listing NewListing = new Listing(); NewListing.Tbl_User.ID = 1; NewListing.Tbl_Category.ID = 2; ... DBEntities.AddToListingSet(NewListing); DBEntities.SaveChanges(); I am using NewListing.Tbl_User.ID instead of NewListing.UserID because the UserID field is not available through intellisense. If I try and create an object for each related field I get a "The relationship between the two objects cannot be defined because they are attached to different ObjectContext objects." error. With this method, I am trying to add the object without the .ID shown above - example NewListing.User = UserObject. I know this should be simple as I just want to reference the ID from the associated table in the main Listing's table. Any help would be greatly appreciated. Thanks in advance, -S

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  • Ordering by number of rows?

    - by Rob
    Alright, so I have a table outputting data from a MySQL table in a while loop. Well one of the columns it outputs isn't stored statically in the table, instead it's the sum of how many times it appears in a different MySQL table. Sorry I'm not sure this is easy to understand. Here's my code: $query="SELECT * FROM list WHERE added='$addedby' ORDER BY time DESC"; $result=mysql_query($query); while($row=mysql_fetch_array($result, MYSQL_ASSOC)){ $loghwid = $row['hwid']; $sql="SELECT * FROM logs WHERE hwid='$loghwid' AND time < now() + interval 1 hour"; $query = mysql_query($sql) OR DIE(mysql_error()); $boots = mysql_num_rows($query); //Display the table } The above is the code displaying the table. As you can see it's grabbing data from two different MySQL tables. However I want to be able to ORDER BY $boots DESC. But as its a counting of a completely different table, I have no idea of how to go about doing that. I would appreciate any help, thank you.

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  • The best way to return related data in a SQL statement

    - by Darvis Lombardo
    I have a question on the best method to get back to a piece of data that is in a related table on the other side of a many-to-many relationship table. My first method uses joins to get back to the data, but because there are multiple matching rows in the relationship table, I had to use a TOP 1 to get a single row result. My second method uses a subquery to get the data but this just doesn't feel right. So, my question is, which is the preferred method, or is there a better method? The script needed to create the test tables, insert data, and run the two queries is below. Thanks for your advice! Darvis -------------------------------------------------------------------------------------------- -- Create Tables -------------------------------------------------------------------------------------------- DECLARE @TableA TABLE ( [A_ID] [int] IDENTITY(1,1) NOT NULL, [Description] [varchar](50) NULL) DECLARE @TableB TABLE ( [B_ID] [int] IDENTITY(1,1) NOT NULL, [A_ID] [int] NOT NULL, [Description] [varchar](50) NOT NULL) DECLARE @TableC TABLE ( [C_ID] [int] IDENTITY(1,1) NOT NULL, [Description] [varchar](50) NOT NULL) DECLARE @TableB_C TABLE ( [B_ID] [int] NOT NULL, [C_ID] [int] NOT NULL) -------------------------------------------------------------------------------------------- -- Insert Test Data -------------------------------------------------------------------------------------------- INSERT INTO @TableA VALUES('A-One') INSERT INTO @TableA VALUES('A-Two') INSERT INTO @TableA VALUES('A-Three') INSERT INTO @TableB (A_ID, Description) VALUES(1,'B-One') INSERT INTO @TableB (A_ID, Description) VALUES(1,'B-Two') INSERT INTO @TableB (A_ID, Description) VALUES(1,'B-Three') INSERT INTO @TableB (A_ID, Description) VALUES(2,'B-Four') INSERT INTO @TableB (A_ID, Description) VALUES(2,'B-Five') INSERT INTO @TableB (A_ID, Description) VALUES(3,'B-Six') INSERT INTO @TableC VALUES('C-One') INSERT INTO @TableC VALUES('C-Two') INSERT INTO @TableC VALUES('C-Three') INSERT INTO @TableB_C (B_ID, C_ID) VALUES(1, 1) INSERT INTO @TableB_C (B_ID, C_ID) VALUES(2, 1) INSERT INTO @TableB_C (B_ID, C_ID) VALUES(3, 1) -------------------------------------------------------------------------------------------- -- Get result - method 1 -------------------------------------------------------------------------------------------- SELECT TOP 1 C.*, A.Description FROM @TableC C JOIN @TableB_C BC ON BC.C_ID = C.C_ID JOIN @TableB B ON B.B_ID = BC.B_ID JOIN @TableA A ON B.A_ID = A.A_ID WHERE C.C_ID = 1 -------------------------------------------------------------------------------------------- -- Get result - method 2 -------------------------------------------------------------------------------------------- SELECT C.*, (SELECT A.Description FROM @TableA A WHERE EXISTS (SELECT * FROM @TableB_C BC JOIN @TableB B ON B.B_ID = BC.B_ID WHERE BC.C_ID = C.C_ID AND B.A_ID = A.A_ID)) FROM @TableC C WHERE C.C_ID = 1

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  • JQuery Control Update Not Happening

    - by Mad Halfling
    Hi, I've got a script that disables a button input control, empties a table body and then (after an AJAX call) re-populates it. It all works fine but sometimes there are a lot of rows in the table so the browser (IE) takes a while to empty and refill it. The strange thing is, while the rows are being emptied, the button still appears to be enabled, however if I put an alert between the button being disabled and the tbody being emptied, the button works properly, disabling visibly before the the alert comes up. Is there any way I can get the button to update before the resource consuming table emptying process/command commences? Thx MH Code sample, as requested (but it's not complex, so I didn't initially include it) $('#Search').attr('disabled', true); $('#StatusSpan').empty(); $('#DisplayTBody').empty(); then I perform my AJAX call, re-enable the button and repopulate the table. As I mentioned, normally this is really quick and isn't a problem, but if there are, say, 1500 rows in the table it takes a while to clear down but the 'Search' button doesn't update on the screen, however if I put an alert after the .attr('disabled' line the button visibly updates when the alert box is up, but without that the button doesn't visibly disable until after the table clears (which is about 3 or 4 seconds with 1500 rows), it just stays in it's down/"mid-press" state. I don't have a problem with the time the browser is taking to render the table changes, that's just life, but I need the users to see visible feedback so they know the search has started

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  • Iphone sdk : Where to put code for a grouped table.

    - by Dave
    I have a root view controller with no nib file, I tried adding this at cellForRowAtIndexPath as that passes in a UITableView as tableView. So I put : tableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStyleGrouped]; It ran with no error but it didnt seem to change anything.

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  • Is a JOIN more/less efficient than EXISTS IN when no data is needed from the second table?

    - by twpc
    I need to look up all households with orders. I don't care about the data of the order at all, just that it exists. Is it more efficient to say something like this: SELECT HouseholdID, LastName, FirstName, Phone FROM Households INNER JOIN Orders ON Orders.HouseholdID = Households.HouseholdID or this: SELECT HouseholdID, LastName, FirstName, Phone FROM Households WHERE EXISTS (SELECT HouseholdID FROM Orders WHERE Orders.HouseholdID = Households.HouseholdID)

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  • How to change a table row color when clicked and back to what it was originally when another row clicked?

    - by user1277222
    As the title explains, I wish to change the color of a row when it is clicked then revert the color when another is clicked, however still change the color of the newly clicked row. A resolution in JQuery would be much appreciated. I just can't crack this one. What I have so far but it's not working for me. function loadjob(jobIDincoming, currentID){ $("#joblistingDetail").load('jobview.php' , {jobID: jobIDincoming}).hide().fadeIn('100'); var last = new Array(); last.push(currentID); $(last[last.length-1]).closest('tr').css('background-color', 'white'); $(currentID).closest('tr').css('background-color', 'red');};

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  • Advance Query with Join

    - by user1462589
    I'm trying to convert a product table that contains all the detail of the product into separate tables in SQL. I've got everything done except for duplicated descriptor details. The problem I am having all the products have size/color/style/other that many other products contain. I want to only have one size or color descriptor for all the items and reuse the "ID" for all the product which I believe is a Parent key to the Product ID which is a ...Foreign Key. The only problem is that every descriptor would have multiple Foreign Keys assigned to it. So I was thinking on the fly just have it skip figuring out a Foreign Parent key for each descriptor and just check to see if that descriptor exist and if it does use its Key for the descriptor. Data Table PI Colo Sz OTHER 1 | Blue | 5 | Vintage 2 | Blue | 6 | Vintage 3 | Blac | 5 | Simple 4 | Blac | 6 | Simple =================================== Its destination table is this =================================== DI Description 1 | Blue 2 | Blac 3 | 5 4 | 6 6 | Vintage 7 | Simple ============================= Select Data.Table Unique.Data.Table.Colo Unique.Data.Table.Sz Unique.Data.Table.Other ======================================= Then the dual part of the questions after we create all the descriptors how to do a new query and assign the product ID to the descriptors. PI| DI 1 | 1 1 | 3 1 | 4 2 | 1 2 | 3 2 | 4 By figuring out how to do this I should be able to duplicate this pattern for all 300 + columns in the product. Some of these fields are 60+ characters large so its going to save a ton of space. Do I use a Array?

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  • Modifying html of dom element that was created after page loaded

    - by Ben321
    I have two separate AJAX calls. One that gets a list of items from a txt file and creates an HTML table out of them and one that talks to a database to find how much each item costs and then lists this in the corresponding table cell for each item (I know this may sound like a strange approach, but it's a good option in our case...). The issue is that the price is not getting written to the table since the table is created (or to be precise, the rows of the table are created) after the page loads. I'm not sure how to fix this. $(document).ready(function() { makeItemTable(); listPrices(); ... }); function makeItemTable() { $.ajax({ url: 'products.php', type: 'GET' }) .done(function(response) { $('.price-table > tbody').html(response); }) } function listPrices() { .ajax({ url: 'prices.php', type: 'GET' }) .done(function(response) { priceData = $.parseJSON(response); $('.price-table tr').each(function() { var item = $(this).find('td:nth-child(1)').text(); if (priceData[item]) { var price = priceData[item]; $(this).find('td:nth-child(2)').text(price); } }) }

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  • Removing rows from MySQL table where the timestamp is over one day old?

    - by Rob
    I found the exact same question here. But it isn't working for me. I've modified it a bit, manipulated it, and I can't figure it out. I'm trying to remove rows that are over a day old. Here is my code: if (isset($_POST['prune'])) { $sql = "DELETE FROM logs WHERE time < date('now', '-1 days')"; mysql_query($sql); echo 'Logs older than one day removed.'; } Fairly simple question I suppose, but its bugging the hell out of me. I would appreciate any help. In case it makes a difference, the column is a TIMESTAMP type.

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  • Can there be TEXT/BLOB columns in a table without filesort in MySQL?

    - by Tower
    Hi, I'm working on a database program and I noticed that when I'm doing queries with tables that have TEXT/BLOB columns, MySQL will use temp tables and use filesort. I'm not entirely sure when and how this happens, but are there cases where MySQL does not use filesort when there are BLOB/TEXT columns? Like if the sort column is type of VARCHAR() with an index?

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  • Know more about shared pool subpool

    - by Liu Maclean(???)
    ????T.askmaclean.com???Shared Pool?SubPool?????,????????_kghdsidx_count ? subpool ??subpool????( ???duration)???: SQL> select * from v$version; BANNER ---------------------------------------------------------------- Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bi PL/SQL Release 10.2.0.5.0 - Production CORE    10.2.0.5.0      Production TNS for Linux: Version 10.2.0.5.0 - Production NLSRTL Version 10.2.0.5.0 - Production SQL> set linesize 200 pagesize 1400 SQL> show parameter kgh NAME                                 TYPE                             VALUE ------------------------------------ -------------------------------- ------------------------------ _kghdsidx_count                      integer                          7 SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 536870914; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_11783.trc [oracle@vrh8 dbs]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_11783.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x60036110 FIVE LARGEST SUB HEAPS for heap name="sga heap(1,0)"   desc=0x60036110 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f938 FIVE LARGEST SUB HEAPS for heap name="sga heap(2,0)"   desc=0x6003f938 HEAP DUMP heap name="sga heap(3,0)"  desc=0x60049160 FIVE LARGEST SUB HEAPS for heap name="sga heap(3,0)"   desc=0x60049160 HEAP DUMP heap name="sga heap(4,0)"  desc=0x60052988 FIVE LARGEST SUB HEAPS for heap name="sga heap(4,0)"   desc=0x60052988 HEAP DUMP heap name="sga heap(5,0)"  desc=0x6005c1b0 FIVE LARGEST SUB HEAPS for heap name="sga heap(5,0)"   desc=0x6005c1b0 HEAP DUMP heap name="sga heap(6,0)"  desc=0x600659d8 FIVE LARGEST SUB HEAPS for heap name="sga heap(6,0)"   desc=0x600659d8 HEAP DUMP heap name="sga heap(7,0)"  desc=0x6006f200 FIVE LARGEST SUB HEAPS for heap name="sga heap(7,0)"   desc=0x6006f200 SQL> alter system set "_kghdsidx_count"=6 scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area  859832320 bytes Fixed Size                  2100104 bytes Variable Size             746587256 bytes Database Buffers          104857600 bytes Redo Buffers                6287360 bytes Database mounted. Database opened. SQL> SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 536870914; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_11908.trc [oracle@vrh8 dbs]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_11908.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x600360f0 FIVE LARGEST SUB HEAPS for heap name="sga heap(1,0)"   desc=0x600360f0 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f918 FIVE LARGEST SUB HEAPS for heap name="sga heap(2,0)"   desc=0x6003f918 HEAP DUMP heap name="sga heap(3,0)"  desc=0x60049140 FIVE LARGEST SUB HEAPS for heap name="sga heap(3,0)"   desc=0x60049140 HEAP DUMP heap name="sga heap(4,0)"  desc=0x60052968 FIVE LARGEST SUB HEAPS for heap name="sga heap(4,0)"   desc=0x60052968 HEAP DUMP heap name="sga heap(5,0)"  desc=0x6005c190 FIVE LARGEST SUB HEAPS for heap name="sga heap(5,0)"   desc=0x6005c190 HEAP DUMP heap name="sga heap(6,0)"  desc=0x600659b8 FIVE LARGEST SUB HEAPS for heap name="sga heap(6,0)"   desc=0x600659b8 SQL> SQL> alter system set "_kghdsidx_count"=2 scope=spfile; System altered. SQL> SQL> startup force; ORACLE instance started. Total System Global Area  851443712 bytes Fixed Size                  2100040 bytes Variable Size             738198712 bytes Database Buffers          104857600 bytes Redo Buffers                6287360 bytes Database mounted. Database opened. SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 2; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12003.trc [oracle@vrh8 ~]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_12003.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x600360b0 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f8d SQL> alter system set cpu_count=16 scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area  851443712 bytes Fixed Size                  2100040 bytes Variable Size             738198712 bytes Database Buffers          104857600 bytes Redo Buffers                6287360 bytes Database mounted. Database opened. SQL> oradebug setmypid; Statement processed. SQL>  oradebug dump heapdump 2; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12065.trc [oracle@vrh8 ~]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_12065.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x600360b0 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003f8d8 SQL> show parameter sga_target NAME                                 TYPE                             VALUE ------------------------------------ -------------------------------- ------------------------------ sga_target                           big integer                      0 SQL> alter system set sga_target=1000M scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area 1048576000 bytes Fixed Size                  2101544 bytes Variable Size             738201304 bytes Database Buffers          301989888 bytes Redo Buffers                6283264 bytes Database mounted. Database opened. SQL> alter system set sga_target=1000M scope=spfile; System altered. SQL> startup force; ORACLE instance started. Total System Global Area 1048576000 bytes Fixed Size                  2101544 bytes Variable Size             738201304 bytes Database Buffers          301989888 bytes Redo Buffers                6283264 bytes Database mounted. Database opened. SQL> SQL> SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 2; Statement processed. SQL>  oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12148.trc SQL> SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options [oracle@vrh8 dbs]$ grep "sga heap"  /s01/admin/G10R25/udump/g10r25_ora_12148.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x60036690 HEAP DUMP heap name="sga heap(1,1)"  desc=0x60037ee8 HEAP DUMP heap name="sga heap(1,2)"  desc=0x60039740 HEAP DUMP heap name="sga heap(1,3)"  desc=0x6003af98 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003feb8 HEAP DUMP heap name="sga heap(2,1)"  desc=0x60041710 HEAP DUMP heap name="sga heap(2,2)"  desc=0x60042f68 _enable_shared_pool_durations:?????????10g????shared pool duration??,?????sga_target?0?????false; ???10.2.0.5??cursor_space_for_time???true??????false,???10.2.0.5??cursor_space_for_time????? SQL> alter system set "_enable_shared_pool_durations"=false scope=spfile; System altered. SQL> SQL> startup force; ORACLE instance started. Total System Global Area 1048576000 bytes Fixed Size                  2101544 bytes Variable Size             738201304 bytes Database Buffers          301989888 bytes Redo Buffers                6283264 bytes Database mounted. Database opened. SQL> oradebug setmypid; Statement processed. SQL> oradebug dump heapdump 2; Statement processed. SQL> oradebug tracefile_name /s01/admin/G10R25/udump/g10r25_ora_12233.trc SQL> SQL> Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options\ [oracle@vrh8 dbs]$ grep "sga heap"   /s01/admin/G10R25/udump/g10r25_ora_12233.trc HEAP DUMP heap name="sga heap"  desc=0x60000058 HEAP DUMP heap name="sga heap(1,0)"  desc=0x60036690 HEAP DUMP heap name="sga heap(2,0)"  desc=0x6003feb8 ??:1._kghdsidx_count ??? shared pool subpool???, _kghdsidx_count???????7 ??? 7? shared pool subpool 2.??????? subpool???4? sub partition ?: sga heap(1,0) sga heap(1,1) sga heap(1,2) sga heap(1,3) ????? cpu??? ?????_kghdsidx_count, ???? ?10g ?AUTO SGA ??? shared pool duration???, duration ??4?: Session duration Instance duration (never freed) Execution duration (freed fastest) Free memory ??? shared pool duration???? ?10gR1?Shared Pool?shrink??????????,?????????????Buffer Cache???????????granule,????Buffer Cache?granule????granule header?Metadata(???buffer header??RAC??Lock Elements)????,?????????????????????shared pool????????duration(?????)?chunk??????granule?,????????????granule??10gR2????Buffer Cache Granule????????granule header?buffer?Metadata(buffer header?LE)????,??shared pool???duration?chunk????????granule,??????buffer cache?shared pool??????????????10gr2?streams pool?????????(???????streams pool duration????) reference : http://www.oracledatabase12g.com/archives/understanding-automatic-sga-memory-management.html

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  • Firebird 2.5 Database Corrupt

    - by BrendanH
    We have an issue where a database hangs the server when: a backup is performed (Hangs on a specific table) selecting * or count(1) from a specific table or viewing data that is related to the table (FKs, etc) We could browse the table to a certain point (using IBExpert) however after about 2900 records the machine just spikes and hangs. Performing a gfix -m does not work, and the validation reports back Record level errors = 4 (no matter how many times we run gfix -m, -v, etc. The Firebird.log file reports back these types of messages: Relation has 91631 orphan backversions (9214273 in use) in table BINS (137) - {Which is apparently just a warning} Unable to complete network request to host "MHPLZA1". Error reading data from the connection. INET/inet_error: read errno = 10054 SERVER/process_packet: broken port, server exiting Shutting down the server with 1 active connection(s) to 1 database(s), 0 active service(s) - {If we leave the backup to run while hanging, it eventually logs this error message} The setup is: The table is question has about 7000 records. The Firebird version is 2.5 Classic Server x64 install. The OS is Windows Server 2008. This is a virtual machine (VMWare) running on a massive server. (Does anyone have issues with VMs and Firebird?). We have the same setup running fine on other servers (However they are not virtual machines). Is there anyway to pin point the issue and or the cause?

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  • Foreign key problem linking tables in phpMyAdmin

    - by alan
    I'm using phpMyAdmin (PHP & MySQL) and I'm having a lot of trouble linking the tables using foreign keys. I'm getting negative values for the field countyId (which is the foriegn key). However, it is linking to my other table and cascading fine. When I go to add data there will be a drop selection for the CountyId and the values will look something like this: " -1 1- " Here is my alter statement: ALTER TABLE Baronies ADD FOREIGN KEY (CountyId) REFERENCES Counties (CountyId) ON DELETE CASCADE

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