syntaxsql 複製 IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] 引數boolean_expression傳回 或FALSE的TRUE表達式。 如果布爾表達式包含 SELECT 語句, SELECT 語句必須以括弧括住。{ sql_statement | statement_block }使用語句區塊所定義的任何 ...
syntaxsql 복사 IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] 인수boolean_expression반환 TRUE 하거나 FALSE. boolean_expression 문이 포함된 SELECT 경우 문을 SELECT 괄호로 묶어야 합니다....
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。 {sql_statement|statement_block} ...
56 -- B2,Syntax 57 -- Desc:搜索的Case语法代码: 58 --=== 59 Case 60 When when_expression Then result_expression 61 [...n] 62 [Else else_result_expression] 63 End 64 65 --Remark: 66 67 go 68 --=== 69 -- B3,Example 70 -- Desc:查看类别ID为2的类别名称。 71 --===...
Syntax57--Desc:搜索的Case语法代码:58--===59Case60Whenwhen_expressionThenresult_expression61[...n]62[Else else_result_expression]63End6465--Remark:6667go68--===69--B3,Example70--Desc:查看类别ID为2的类别名称。71--=== 1.2,case when cl...
Transact-SQL language reference for IF-ELSE statements to provide control flow in Transact-SQL statements.
格子Syntax用语 CASE表达式有两种不同的格式:简单和搜索。这两种类型的格式稍有不同,如图1所示。 图1:CASE syntax用语 通过查看图1中的CASE表达式的两种不同格式,您可以看到每种格式如何提供一种不同的方式来标识一个确定案例表达式结果的多个表达式。对于这两种情况,每个子句都执行一个布尔测试。在简单的CASE表达式中...
IF… ELSE— Perform conditional flow control. ITERATE— Restart a LOOP or WHILE statement. LEAVE— Exit a server code module such as stored procedure, function, and so on and return control to the calling scope. LOOP— Loop indefinitely. REPEAT… UNTIL—...
The functionality is compatible, but the syntax differs. SQL Server usesIF <condition> <statement> ELSE <statement>. Aurora MySQL usesIF <condition> THEN <statement> ELSE <statement> ENDIF. Rewrite T-SQL code to add the mandatoryTHENandENDIFkeywords. ...
Syntax IF boolean_expression {sql_statement | statement_block} [ELSE boolean_expression {sql_statement | statement_block}] Using the IF statement 8 If there are multiple T-SQL statements, then these must be enclosed within the BEGIN and END keywords ...