SQL commands and syntax SQL is, fundamentally, a programming language designed for accessing, modifying and extracting information from relational databases. As a programming language, SQL has commands and a syntax for issuing those commands. SQL commands are divided into several different types, includ...
Commands: completion Generate the autocompletion script for the specified shell config Modify sqlconfig files using subcommands like "sqlcmd config use-context mssql" create Install/Create SQL Server, Azure SQL, and Tools delete Uninstall/Delete the current context help Help about any command open ...
Some of The Most Important SQL Commands SELECT- extracts data from a database UPDATE- updates data in a database DELETE- deletes data from a database INSERT INTO- inserts new data into a database CREATE DATABASE- creates a new database ...
SQLWorkbenchCommands 类型公开以下成员。 字段 展开表 名称说明 cmdidAEActivateCodeWindow 属于SQLEditorCommandSet 命令集的菜单命令 ID。有关原始声明的详细信息,请参阅 SQLEditorsUI 附属程序集中的 pkgicmd.h 标头。 cmdidAEActivateHeaderControl 属于SQLEditorCommandSet 命令集的菜单命令 ID。有关原始声明的...
Apart from these restrictions, user-defined functions are acceptable in theSELECTclause. However, do not forget that usingSELECTmight slow performance. To learn how you can useSELECTwith user-defined functions, see the Examples section. JoinsVisual FoxPro supports ANSI SQL '92 Join syntax, allowing...
Using parameters with stored procedures Getting values of return codes Parameter names and markers Depending on the connection type that the Execute SQL task uses, the syntax of the SQL command uses different parameter markers. For example, the ADO.NET connection manager type requires that the SQL...
NoteCandidate indexes, created by including theUNIQUEoption (provided for ANSI compatibility) inCREATE TABLE – SQLorALTER TABLE – SQLcommands, are not the same as indexes created in theINDEXcommand with theUNIQUEoption. An index created in theINDEXcommand using theUNIQUEoption allows duplicate inde...
RETURN QUERY commands, and then a final RETURN command with no argument is used to indicate that the function has finished executing. RETURN NEXT and RETURN QUERY do not actually return from the function — they simply append zero or more rows to the function’s result set. ...
Then, edit the CONCAT function syntax and type the rest of the statement, such as in the following: SELECT CONCAT(title, ' is a book in the library.') FROM books; 1.8.1 User-Defined Snippets You can create and edit snippets. User-defined snippets are intended mainly to enable you to...
For example, you can create a user called migrations with the minimum required privileges required to migrate a database by using the following commands: CREATE USER migrations IDENTIFIED BY password DEFAULT TABLESPACE users TEMPORARY TABLESPACE temp; GRANT CONNECT, RESOURCE, CREATE VIEW, CREATE PUBLIC...