It executes the ELSE statement and prints the message for it. In this case, we have two SQL IF statements. The second IF statement evaluates to false, therefore, it executes corresponding ELSE statement 它执行ELSE语句并为其打印消息。 在这种情况下,我们有两个SQL IF语句。 第二条IF语句的计算结...
The IF ELSE statement controls the flow of execution in SQL Server. It can be used in stored-procedures, functions, triggers, etc. to execute the SQL statements based on the specified conditions. Syntax: Copy IF Boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement...
First, IF statement condition is TRUE. It prints the message inside the IF statement block Second, IF statement condition is FALSE, it does not print the message inside IF statement block It executes the ELSE statement and prints the message for it. In this case, we have two SQL IF state...
{ 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...
This SQL Server tutorial explains how to use the IF...ELSE statement in SQL Server (Transact-SQL) with syntax and examples. In SQL Server, the IF...ELSE statement is used to execute code when a condition is TRUE, or execute different code if the conditio
if/then else case statement query in SQL ServerThis creates start and end columns by doing a ...
syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] 引數 boolean_expression 傳回 或FALSE的TRUE表達式。如果boolean_expression包含SELECT語句,SELECT語句必須以括弧括住。 使用語句區塊所定義的任何有效 Transact-SQL 語句或語句群組。 若要定義語句區塊 (batch),請...
Initializes a new instance of theIfStatementclass. 命名空间:Microsoft.SqlServer.TransactSql.ScriptDom 程序集:Microsoft.SqlServer.TransactSql.ScriptDom(在 Microsoft.SqlServer.TransactSql.ScriptDom.dll 中) 语法 C# publicIfStatement() 请参阅 参考 ...
AlterFullTextCatalogStatement 클래스 AlterFullTextIndexAction 클래스 AlterFullTextIndexStatement 클래스 AlterFullTextStopListStatement 클래스 AlterFunctionStatement 클래스 AlterIndexStatement 클래스 AlterIndexType 열거형 AlterLoginAddDropCredentialStatement 클래스 Alter...
statement2; ... ELSE statement3; statement4; ... END IF; 1. 2. 3. 4. 5. 6. 7. 8. 9. 其中,condition是一个布尔表达式,如果为真(即非零),则执行statement1,statement2等等;如果为假(即零),则执行statement3,statement4等等。 值得注意的是,IF-ELSE语句必须以END IF;结束。