This SQL Server tutorial explains how to use theIF...ELSE statementin SQL Server (Transact-SQL) with syntax and examples. Description In SQL Server, the IF...ELSE statement is used to execute code when a condition is TRUE, or execute different code if the condition evaluates to FALSE. Syn...
AlterRemoteServiceBindingStatement AlterResourceGovernorCommandType AlterResourceGovernorStatement AlterResourcePoolStatement AlterRoleAction AlterRoleStatement AlterRouteStatement AlterSchemaStatement AlterSearchPropertyListStatement AlterSecurityPolicyStatement AlterSequenceStatement AlterServerAuditSpecificationStatement...
Use the IF statement for control flow, which is unlike theIIf (MDX)function and theCASE Statement (MDX)that can only be used to return values or objects. Examples In the following example, the scope is restricted to the Country level of the Customers Geography hierarchy in the Customers dime...
IfStatement 类型公开以下成员。属性展开表 名称说明 ElseStatement Gets the statement that will be executed if the predicate evaluates false. Optional, may be nullnull 引用(在 Visual Basic 中为 Nothing). FirstTokenIndex Gets or sets the first token index. (从 TSqlFragment 继承。) FragmentLength...
You can use theCASEstatement within theWHEREclause.
程序集:Microsoft.SqlServer.TransactSql.ScriptDom(在 Microsoft.SqlServer.TransactSql.ScriptDom.dll 中) 语法 C# [SerializableAttribute]publicclassIfStatement:TSqlStatement IfStatement 类型公开以下成员。 构造函数 名称说明 IfStatementInitializes a new instance of the IfStatement class. ...
Depending on your needs, here are a couple of ways:
This article walks through different versions of the T-SQL IF EXISTS statement for the SQL database using various examples. IF EXISTS in SQL 2014 or before DROP ..IF EXISTS in SQL Server 2016 to SQL Server 2019 Introduction Suppose you want to deploy objects such as tables, procedures,...
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{ sql_statement | statement_block } 使用语句块定义的任何 Transact-SQL 语句或语句分组。 除非使用了语句块,IF否则或ELSE条件只能影响一个 Transact-SQL 语句的性能。 若要定义语句块,请使用流控制关键字BEGIN和END。 注解 IF...ELSE可以在批处理、存储过程和即席查询中使用构造。 在存储过程中使用此构造时,通...