Download AQT Advanced Query Tool

Author: f | 2025-04-25

AQT - Advanced Query Tool. The abbreviation AQT stands for Advanced Query Tool and is mostly used in the following categories: Query, Tool, Database, Software, Technology.

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Will be a timestamp – example 20020526155411. To distinguish AQT plans from other entries in your plan table, AQT plans use a Queryno of 678.AQT will not automatically delete plans, but will retain them in your PLAN_TABLE until you choose to delete them.Delete this PlanThis button will delete the existing plan.Delete all Plans except thisThis button allows you to purge all plans except the one currently shown. Only plans generated by AQT will be deleted – other plans will be left untouched.CostThis will show you the Cost estimate of your SQL statement. This will only be shown for Oracle and DB2/UDB.For Oracle, this will be blank if Oracle has decided to do rules-based optimization instead of cost-based optimization. Oracle will use rules-based optimization in two circumstances:your database has been configured to always use rules-based optimizationthe tables in your query do not have any statistics (statistics are generated when you run an ANALYZE on your tables). Run DB2 Index Advisor and Run DB2 Explain ToolThese buttons appear for DB2/UDB. functionactionexplanationRun DB2 Index Advisorruns program db2advisDB2 Index Advisor is a very valuable tool for recommending indexes that may improve the processing of your query. In order to use the Index Advisor, you need to create some extra Explain tables (ADVISE_WORKLOAD and ADVISE_INDEX). Run DB2 Explain Formatterruns program db2exfmtDB2 Explain Tool is an "old" text-based version of the Visual Explain, however it can sometimes provide useful information.These functions will only work if the db2advis and db2exfmt programs are installed on your PC and they are in your PATH. These programs are only installed with some types of the DB2 Client and not in others.Run Index Advisor and Run Explain Formatter can not be used if you specify Options > User Rights > Disable Save Password. If you try to do so you will get message For security reasons, this function can not be used. See Disable Save Password for more on this.You can customize the commands that AQT uses for invoking these functions. You do this by changing the db2advis and db2expl entries at the bottom of the db2udb.cfg file (this file is In your AQT directory).Plan display gridThe grids in this pane show the information about the Plan. Your database documentation explains the contents of this pane. AQT has a number of different plan queries that can be shown here – see the section Query below.The Plan display is shown in two grids:the Main grid shows the multiple lines of the explain planthe Detail grid which shows the detail of an individual row in the Main gridAs you select entries in the Main grid, the data shown in the Detail grid will change. The Detail grid can be resized if required, and hidden with View >Detail Grid.SQL textAQT will also show you in the bottom pane the SQL statement that the Plan is based on. The SQL text is not present in the Explain_Table; instead, this information comes from the AQT SQL Statement history. It is possible that the SQL statement cannot be found in the SQL statement history (which contains only the last 200 SQL statements you have run). In this case the SQL text pane will be blank.For DB2/UDB the Text frame provides three options to determine the SQL display:SQL (your SQL query), Optimised SQL (the SQL as "rewritten" by the DB2 optimiser)Comments (any free-format comments you may have added to your explain). You can add/change any comments by typing them into the text box and clicking on Set. Query listboxAQT has a number of different ways to display the Plan Information; select the one you wish to use from this listbox.These queries are different for different database types; they are specified in the AQT cfg file and so can be added / amended if required. Up to 5 explain-queries can be specified.Database typequery namedescriptionOraclestandard queryThe normal query used to display the plan information in a meaningful way. V7If you are running Oracle V7, or have an "old" structure of your Plan_Table, select V7. This uses a simpler query with fewer Plan_Table columns.full explain tableShows the full contents of the explain table, which can be useful extra information.DB2 z/OSstandard queryThe normal query used to display the plan information in a

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AQT can display the Explain Plan for an SQL statement. The Explain Plan shows you information about the way the database will process your SQL statement. This information is useful for analysing and improving the performance of your queries.To show the Explain Plan, in the Run SQL window, select Run > Explain SQL or hit F8. If you wish to see your existing Explain Plans, without Explaining the SQL, select Window >Explain Plan. This feature is available for Oracle, DB2 z/OS, DB2/UDB, SQL Server, Sybase, MySQL, IDMS and Teradata. For MySQL and SQL Server, the Explain-plan information is shown as a normal query display. For Sybase, the Explain-plan information is shown in a pop-up box. The Sybase ODBC Driver returns the explain data to AQT in a strange order. This makes the display difficult to use, especially if you have a complex query. There is little we can do to correct this issue.Explain Plan for Oracle and DB2For Oracle and DB2 a special Explain Plan window is displayed. Plan / Explain Tables neededFor some databases, in order to use the Explain Plan feature, you will need to have Plan or Explain tables set up for you. If you do not have these you will get the message PLAN_TABLE not found (or similar) when you try to Explain your SQL. To create the Plan / Explain tables, contact your DBA. For DB2/UDB, the DDL for the Explain tables are in %sqllib%\misc\explain.ddl.If you get stuck, email support and we can send you DDL for the plan/explain tables. Please tell us what database type you are using - otherwise we'll just have to email you back and ask you. ;)Explain Plan windowThe Explain Plan window contains the following:PlanThe combo-box and buttons allow you to select the plan you wish to display. By default the most recent plan is shown, however you may select another plan. Only plans generated by AQT will be seen here. Plan IdentifierAQT will compose a unique identifier for the Plan when it does an Explain Plan.For Oracle this is aqt plus a timestamp – example aqt20020526155411.For DB2 z/OS this. AQT - Advanced Query Tool. The abbreviation AQT stands for Advanced Query Tool and is mostly used in the following categories: Query, Tool, Database, Software, Technology.

Advanced Query Tool (AQT) - DigitalVA

The same window displays either the contents of a table, or the result of a query. Principal functions of the window are: Build a queryFind rowsGroup columns Sort columnsCompare contents of two tables, or contents of one table at different timesPivot reportYou can change the appearance of the display, or set some options.Data Display toolbarMany of these buttons will only be visible in certain circumstances:Collapse / Expand / Calc will only be visible when you have grouped your dataMore / Close will only be visible when your query is still active (see Get More Rows)Apply will only be visible if your table / query has a layout file than can be appliedYou can customize the buttons that appear on this toolbar.Some tasks available in the Data Display Window have shortcut keys.Saving displayed dataYou can save the data in this display (to disk) and retrieve it later. This is very useful if you are displaying some useful data that you may wish to refer to at some later time.Click on File > Save Results and specify the name of the file where you want the results saved. The query-result is saved in an AQT proprietary format. The file type will be grd (AQT saved-grid).You can use File > Open Saved Results to redisplay a saved results-grid.When you have saved the results of a query, this will be shown in the SQL History window - a table-icon will appear in the Saved column. You can re-display the results by clicking on this table-icon.The Layout of the display will be saved also (as a separate file).Exporting DataUse File > Export Data (or F7) to export your query results to a file. This will open the Export Data window where you can select the options for the export.Updating, Deleting, Inserting RowsTo do this, click on Row > Update mode, Delete mode etc, or click on the appropriate icon. These will take you into Update Mode in the Row Display window. You can also edit data directly in the Data Display window. Quickly make small amendments by using the right mouse menu.Refreshing the DataIf you have run an update and changed the data, hit Refresh or F5 to redo the query and redisplay the data. The sort order, row and column position, and grouping will be reestablished after the data has been refreshed. If you have done a Find (Ctrl+F) with the "Only show rows Options - Display LimitsMax Rows DisplayedSpecifies the number of rows to display when a query is run, or when a table is displayed. You may just wish to set this to the maximum value, however be very aware that when you set this to a large value your queries will take a long time to run and more memory will be used.Our recommendation is to set this to a low value (1000) and just change this to a higher value when you want to see a lot of rows.Warning: if you set this to No Limit, and display a very large number of rows, your machine can run out of memory. Use this with caution. For this reason, AQT will warn you if you use this setting.If you are running the Evaluation version of AQT you will not be able to increase this beyond 50 rows.Max Column SizeThis option determines the maximum size of a column held in the result-set. Our recommendation is to set this to a low value (200) and change this to a higher value only when you wish to see the full text of your large columns. A high value will result in an large amount of memory used by AQT.For displaying the full value of large columns (such as LOBs), it is recommended that you use Options > LOB Options > Write LOBs to Files.If you are running the Evaluation version of AQT you will not be able to change the Max Column Size value.

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AQT has a dialog for building and running a Merge Table statement. You open this dialog from the Database Explorer window by either:selecting a table and clicking Table > Merge Tableselecting a table and right-click > Merge TableThe Merge Table statement is a valid statement in some, but not all, databases. AQT's Merge function has been tested against DB2 for LUW, Oracle, SQL Server and PostgreSQL v15. Understanding the Merge StatementThe Merge statement is used to apply updates, inserts and deletes against a table (the Merge Into table). The data to be applied to the table comes from Merge From. This can be either a table or query. This table is not affected by the Merge.The rows in the two tables are matched by the Match Cols columns. These act much like the columns in a join. By default, AQT will populate these with the Primary Key columns for the tables, but you can specify other columns.Both the Merge Into and Merge From tables must specify the same number of Match Cols.Use Col Names to specify alias names of the Merge From columns. With the Merge Statement, you specify a number of Merge Actions. These are discussed below.When you click on Run, AQT will run the Merge. If you are using SQL Server and have specified the Output clause (on the Other tab), AQT will display the Merge output on a Data Display window.Merge ActionsYou need to specify at least one Merge Action. The main window allows you to specify two:When Matched. This action will be performed when a row is in both the Merge From table and the Merge Into table. Appropriate actions are:Update Row. The row in the Merge Into table will be updated from values in the matching row of the Merge From table. In the grid, check Upd? to specify which columns are to be updated, and in Update From which columns in the Merge From table the data will come from.You can specify any expression for the update - examples: BONUS * 1.5, SALARY * 0.1, NULL, DEFAULT.Delete Row. The row in the Merge Into table will be deleted when present in the Merge From table.When Not Matched. This action will be performed when a row is in the Merge From table, but not in the Merge Into table. There is only one action:Insert. A row is inserted into the Merge Into table from values in the Merge From table.In the and box, you can specify an additional condition which needs to be met for the action to be performed.You can have multiple Merge Actions. Click on the More tab to be able to specify two more.NotesSome databases do not report on the number of. AQT - Advanced Query Tool. The abbreviation AQT stands for Advanced Query Tool and is mostly used in the following categories: Query, Tool, Database, Software, Technology. Advanced Query Tool (AQT) overview. Advanced Query Tool (AQT) is a versatile and powerful database management solution tailored for complex query execution and

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