Bert Posted February 1, 2012 Share Posted February 1, 2012 I have an existing database called test.db. I know there is a column called "Name" and a column called "Value". There are about 51 rows of data. I've been poring through the help file, goggling like mad and I'm no closer to being able to work with this thing. Outside of today I have about zero experience with SQLite. I know after this project is done I may not work with again for a long time due to other projects in the pipeline. What I'm looking to do is simply delete some of the data in the values column. In simply trying to run a query I keep running into an error: no such table Example script: #include <SQLite.au3> #include <SQLite.dll.au3> #include <File.au3> Local $hQuery, $aRow, $aNames _SQLite_Startup() If @error Then MsgBox(16, "SQLite Error", "SQLite3.dll Can't be Loaded!") Exit -1 EndIf ConsoleWrite("_SQLite_LibVersion=" & _SQLite_LibVersion() & @CRLF) Local $sDbName = "test.db" ;DB is in the same folder as the script Local $hDskDb = _SQLite_Open($sDbName) ; Open a permanent disk database - this works fine _SQLite_Query(-1, "SELECT ROWID,1 FROM Test ORDER BY a;", $hQuery) ;what am I doing wrong here? I get no such table: Test, Name, Value...what do I use here? If @error Then MsgBox(16, "SQLite Error", "Can't open or create a permanent Database!") Exit -1 EndIf ; we can use the 3 database as needed by refering to their handle ; close the Dbs we created, in any order _SQLite_Close($hDskDb) ; we don't really need that DB FileDelete($sDbName) _SQLite_Shutdown() output from the console when I run the script: _SQLite_LibVersion=3.7.2 ! SQLite.au3 Error --> Function: _SQLite_Query --> Query: SELECT ROWID,1 FROM Test ORDER BY a; --> Error: no such table: Test !>15:08:53 AutoIT3.exe ended.rc:-1 >Exit code: -1 Time: 7.006 What am I doing wrong here? The Vollatran project My blog: http://www.vollysinterestingshit.com/ Link to comment Share on other sites More sharing options...
JohnQSmith Posted February 1, 2012 Share Posted February 1, 2012 Just because the database file is called "test.db" does not necessarily mean the name of the table in the database is called "test". Whenever someone says "pls" because it's shorter than "please", I say "no" because it's shorter than "yes". Link to comment Share on other sites More sharing options...
Moderators JLogan3o13 Posted February 1, 2012 Moderators Share Posted February 1, 2012 You could use something like this to find out the names of all your tables: SELECT name FROM test WHERE type='table' ORDER BY name; "Profanity is the last vestige of the feeble mind. For the man who cannot express himself forcibly through intellect must do so through shock and awe" - Spencer W. Kimball How to get your question answered on this forum! Link to comment Share on other sites More sharing options...
jchd Posted February 1, 2012 Share Posted February 1, 2012 (edited) Hi MPH, Please run the following (after opening a connection with handle $hdb, obviously): _SQLite_GetTable2d($hdb, "select * from sqlite_master where type = 'table'", $aTables) _ArrayDisplay($aTables) You can then see which tables are there and how they were declared (the SQL column). Edit: JLogan, your query won't work in SQLite. Edited February 1, 2012 by jchd This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
JohnQSmith Posted February 1, 2012 Share Posted February 1, 2012 I was just going to offer something to that effect, but had to look it up first. If you have the sqlite3.exe program, you can do the following. cmdprompt> sqlite3 test.db sqlite> .tables ... tables names are listed here sqlite> .exit cmdprompt> Whenever someone says "pls" because it's shorter than "please", I say "no" because it's shorter than "yes". Link to comment Share on other sites More sharing options...
Moderators JLogan3o13 Posted February 1, 2012 Moderators Share Posted February 1, 2012 I was just updating mine, but jhcd beat me to it. If you don't know the table name, you have to go through the sqlite_master. "Profanity is the last vestige of the feeble mind. For the man who cannot express himself forcibly through intellect must do so through shock and awe" - Spencer W. Kimball How to get your question answered on this forum! Link to comment Share on other sites More sharing options...
jchd Posted February 1, 2012 Share Posted February 1, 2012 Correct. That's where SQLite stores the schema. Granted, it isn't in the most practical form (have to reparse SQL to get full details by program but it's better than nothing). This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
Bert Posted February 1, 2012 Author Share Posted February 1, 2012 I'll have to test in the morning for the db is on my work PC The Vollatran project My blog: http://www.vollysinterestingshit.com/ Link to comment Share on other sites More sharing options...
Bert Posted February 2, 2012 Author Share Posted February 2, 2012 (edited) Hi MPH, Please run the following (after opening a connection with handle $hdb, obviously): _SQLite_GetTable2d($hdb, "select * from sqlite_master where type = 'table'", $aTables) _ArrayDisplay($aTables) You can then see which tables are there and how they were declared (the SQL column). Edit: JLogan, your query won't work in SQLite. OK, tried your code. I got a results back and tried each item listed. Still getting the same error : no such table. expandcollapse popup#include <SQLite.au3> #include <SQLite.dll.au3> #include <File.au3> Local $hQuery, $aNames, $aTables Local $iRows, $iColumns, $sMsg _SQLite_Startup() If @error Then MsgBox(16, "SQLite Error", "SQLite3.dll Can't be Loaded!") Exit -1 EndIf ConsoleWrite("_SQLite_LibVersion=" & _SQLite_LibVersion() & @CRLF) Local $sDbName = "test.db" ;DB is in the same folder as the script Local $hDskDb = _SQLite_Open($sDbName) ; Open a permanent disk database - this works fine ;_SQLite_GetTable($hDskDb, "select * from sqlite_master where type = 'table'", $aTables, $iRows, $iColumns) ;_ArrayDisplay($aTables) ;returned - [0]|type|name|tbl_name|rootpage|sql ;_SQLite_GetTable2d($hDskDb, "select * from sqlite_master where type = 'table'", $aTables, $iRows, $iColumns) ;_ArrayDisplay($aTables) #cs Returned: [0]|5 [1]|type [2]|name [3]|tbl_name [4]|rootpage [5]|sql #ce _SQLite_Query(-1, "SELECT ROWID,1 FROM NAME ORDER BY Name;", $hQuery) ;still doesn't work. If @error Then MsgBox(16, "SQLite Error", @error) Exit -1 EndIf While _SQLite_FetchData($hQuery, $iRows) = $SQLITE_OK $sMsg &= $iRows[0] WEnd _SQLite_Exec(-1, "DROP TABLE aTest;") ; Remove the table MsgBox(0, "SQLite", "Get Data using a Query : " & $sMsg) _SQLite_Close($hDskDb) FileDelete($sDbName) _SQLite_Shutdown() #cs _SQLite_LibVersion=3.7.2 ! SQLite.au3 Error --> Function: _SQLite_Query --> Query: SELECT ROWID,1 FROM NAME ORDER BY Name; --> Error: no such table: NAME !>08:44:51 AutoIT3.exe ended.rc:-1 >Exit code: -1 Time: 5.749 #ce Edited February 2, 2012 by MPH The Vollatran project My blog: http://www.vollysinterestingshit.com/ Link to comment Share on other sites More sharing options...
saywell Posted February 2, 2012 Share Posted February 2, 2012 Why not open it in an sqlite browser? There's a firefox add-on called SQlite manager, which i quite like. Others exist. You could use this to find out the table structure so you can write programmed edits etc in the future - or use its editing facility to make the occasional ad hoc edit that's no worth writing script for. William Link to comment Share on other sites More sharing options...
jchd Posted February 2, 2012 Share Posted February 2, 2012 (edited) If you don't get anything back but only headers, it means the DB does actually contain no table, as the first item (table count) of the _SQLite_GetTable shows. The file size doesn't mean much as when dropping a table, pages that were freed are not automatically vaccumed. There's nothing you can do to reliably "undrop" table(s). Lastly: stay away of the _SQLite_Query, _SQlite_Step, _SQLite_FetchData sequence. First you have a lot of error handling to code and you also have to finalize the statement. Favor _SQLite_GetTable[2d] instead in a single operation. Edited February 2, 2012 by jchd This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
Bert Posted February 3, 2012 Author Share Posted February 3, 2012 I did manage to edit the thing to the way I needed it. The problem is when I tried to used it in the app the db is used in I found the app simply mad a new db for it didn't like how I modified the first one. I may need more help on this. The Vollatran project My blog: http://www.vollysinterestingshit.com/ Link to comment Share on other sites More sharing options...
jchd Posted February 3, 2012 Share Posted February 3, 2012 If it's something you can share, even privately, I'd be very pleased to help.If that's private stuff, I warmly recommend you start by downloading and installing SQLite Expert Personal. From there, open your DB and look around. Don't edit things inside without knowing exactly what to do.FYI, in the existing application, _SQLite_Open should have the existing DB as parameter. Then it won't create a new one. Then it's possible that the app drops tables or does cleanup activities. May be you want to skip that. Anyway, work on a copy. This wonderful site allows debugging and testing regular expressions (many flavors available). An absolute must have in your bookmarks.Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe hereRegExp tutorial: enough to get startedPCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta. SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt) Link to comment Share on other sites More sharing options...
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