Toad Data Studio 1.0 - User Guide

Build a Subquery

In this tutorial you will create a subquery to use to filter your selection of address IDs to only those addresses from specific regions.

To build a subquery

1. Connect to the Toad Sample (Access) database in the Navigation Manager.

2. Select Tools | Query Builder | Query Builder.
3. Drag the ADDRESS table to the Diagram pane.

4. Click these column names in the ADDRESS table to add the columns to the query:

   • ADDRESS_ID
   • REGION_ID
5. To add a subquery:

   1. Select the Where field in the REGION_ID column and click . The Where Condition editor displays.

      

   2. Select the IN operator from the list, and then click Subquery.

      

   3. A child Query Builder window displays for you to use to build the subquery.

      • The child (subquery) Query Builder window includes a Diagram pane, a Criteria pane, and a Queries pane for navigating back and forth between subqueries and the main query.

        

   4. Drag the REGION table to the Diagram pane and select the REGION_ID column.

   5. Select the Where field in the REGION_ID column and click . In the Where Condition editor, select the In comparison operator, select Constant, and select the values 1 and 2.

      

   6. Your subquery window should look something like this:

      

   7. Click to execute the subquery. Select the Results tab to review the result set for the subquery.

6. Click the Query node in the Queries pane to return to the main query window. A call-out in the main query Diagram pane indicates that the statement contains a subquery and identifies the column it is on. Hover over the call-out to view the subquery statement.

   

7. Click to execute the main query.

Related Topics  

Build Queries Visually

Add Subqueries

Edit SQL

The editor combines a powerful SQL and procedure editor into a single interface.

Notes:

• See Editor Shortcut Keys for more information about keyboard shortcuts used in the Editor.
• Toad has implemented a large script mode to improve performance when opening files larger than 2 MB. By default, when you open a large file, some features such as word wrap, syntax highlighting, and the Script Map are disabled in the Editor. When a large script loads, a message indicates that you are in large script mode in the right margin of the Editor. You can cancel large script mode by clearing the option in Tools | Options | Editor | General.
• To show the Script Map, Script Results or Group Execute panes for the current Editor window select Editor | Windows | <pane>.

To edit SQL

1. Select Tools | Edit | SQL Editor.

   Note: You can query the worksheet from the Editor by entering a dollar sign ($) followed by a cell range to limit the results similar to the following statement:

   Select * from (MyWorksheet$A1:C10)

   You can also query the entire worksheet by entering a dollar sign ($) after the worksheet name; however, this returns empty rows and columns in the worksheet.

2. Review the following to help enter SQL:

   • Complete SQL Statements Automatically

   • Explore and Edit Script with Script Map

   • Insert Code Snippets and Create Code Snippets
   • Add Toad Views

   • Recall SQL Statements 

   • Add or Remove Application Code 

   • View Objects at Cursor 

   • Record and Play Macros 

   • Advanced Analytics
   • About Toad Script

3. Click to format the code. See Format SQL for more information.

4. Right-click a block of code in the Editor to see additional actions available in the context menu. For example, you can turn a line into comment, uppercase or lowercase it, surround with snippet, set numbered bookmark, collapse or expand nodes, send to Query Builder and etc. You can also right-click an object (e.g. a table) and manage it as if in the Object Explorer.
5. Hold Alt + left-click and drag to select vertical blocks of text in Editor.

6. Select the block of code in the Editor, and click to validate the syntax.

   Note: Toad undoes any changes to the object and data in the database after executing the script (notice that the Result Sets tab is empty). To modify the object and data, you need to execute the script.

7. Click Fetch n rows to specify the number of rows to initially retrieve when executing the query. You can set a default value for this option in Tools | Options | Database | General.

8. Click to execute SQL on the current server or multiple servers at one time. See Group Execution of Scripts for more information. In the Editor toolbar, the execute SQL buttons are grouped under . The button will retain the function of the last execute action for the active Editor window. If you switch to another Editor window, the button will change to reflect the last action for that window. For more information, see Execute SQL.

9. Select the block of code in the Editor and click to create a stored procedure. Stored Procedure creation dialog automatically recognizes procedure body and declared parameters.

Tips:

• Toad automatically saves a backup copy of any modified editor file in the Application Data Directory to avoid losing your work. When you restart Toad after an unexpected close, Toad checks the timestamp on the backup file against the original file, and opens the file that has the latest timestamp. The document recovery option is in Tools | Options | Environment | General. See General Environment Options for more information.
• You can save the current connection, SQL script, executed results, filters, and group execute connections/results (if enabled) in a Toad editor file (.tef). This file format is useful for building scripts that have large result sets that you do not want to continue executing or for saving results when you have not finished building a script.
• Editor supports floating window mode.
• The script is automatically checked for syntax errors when executing current statement (F9), checking syntax, changing database, or refreshing the Script Map. The syntax errors are listed in the Script Results pane in the Messages tab.

• If you copy and paste a SQL statement from one editor window to another, Toad automatically rewrites the statement to match the syntax of the connection for the second editor window.

Configure Editor Options

You can specify options for the look and behavior of the SQL Editor by using the Toad Options dialog.

To configure Editor options

1. Select Tools | Options.

2. To specify one of the following options, select the corresponding page in the Options dialog.

   Option Description	Page in Options Dialog
   Display the tabs for the current connection only when using Tabbed windows	Select Environment | Interface
   Change background color of the Editor	Select Editor | General
   Use connection color as background color	Select Editor | General
   Position Editor tab headers vertically	Select Environment | Interface
   Set options to display line numbers, line modifications, and general text formatting	Select Editor | General
   Specify options to automatically replace typed text with the correct substitution text	Select Editor | Auto-replace
   Customize code formatting options including headers and layout characteristics	Select Editor | Formatter

Click here to view a video of this feature.

Editor Shortcut Keys

You can assign individual shortcut keys in Keyboard options. See Keyboard Options for more information. You can also customize Toad to use the shortcut keys of existing applications such as Toad for Oracle, SQL Navigator, or Query Analyzer in the Configuration Wizard (Tools | Configuration Wizard).

Caution! If you have some global access keys assigned, make sure that Toad shortcut keys do not coincide with them. When using such duplicating shortcut keys in Toad, the third party application commands, assigned globally, will be performed instead of ones assigned by Toad.

Tip: You can also use Auto-replace to specify words which can be used as shortcuts for entering phrases or statements. See Use Auto-Replace in the Editor for more information.

The following table describes the default shortcut keys in Toad.

Related Topics

About Editing SQL

Insert Code Snippets

About Debugging SQL

View Result Sets

The Result Sets tab displays a data grid for executed SQL statements and scripts that return data.

If you occasionally closed the Results pane, you can restore it by selecting Editor | Windows | Script Results.

Visual Inspection Grid

You can easily review all (or the selected Result sets) in one Result Sets tab. Left-click and hold Shift or Ctrl to select more than one Result sets of your script. Select All results to review all in one tab.

To enable view of all Result Sets in one Tab

• Check Options | Database | Script results | Enable all results view

Troubleshoot Data

• If you cannot edit data, click the red icon in the lower left corner of the grid, and then click OK on the window that displays. You do not need to edit fields in this window. See Edit Data in Read-Only Grids for more information.
• By default, auto commit is enabled and any row changes you make are automatically submitted to the database. You can disable this option in Tools | Options | Environment | Grid.

Tips for Working with Data

Related Topics

View Execution Log Messages 

Generate Explain Plans 

Filter Data