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 Transact-SQL 語句或語句群組。 除非使...
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...
SQL Server提供了使用SQL IF语句执行实时编程逻辑的功能。 (Syntax) In the following SQL IF Statement, it evaluates the expression, and if the condition is true, then it executes the statement mentioned in IF block otherwise statements within ELSE clause is executed. 在下面SQL IF语句中,它计算表达式...
SQL Server 流程控制中的 If...Else 语句。 1,If...Else 语句 1--===2--1, If...Else语句3--Desc:If..Else语句是条件判断语句4--author:ylbtech5--pubdate:10:39 2012/12/156--===7go89go10--===
syntaxsql Copy IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments boolean_expression An expression that returns TRUE or FALSE. If the boolean_expression contains a SELECT statement, the SELECT statement must be enclosed in parenthes...
syntaxsql Kopie IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Argumenteboolean_expressionEin Ausdruck, der zurückgibt TRUE oder FALSE. Wenn die boolean_expression eine SELECT Anweisung enthält, muss die SELECT Anweisung in Klammern ...
syntaxsql Copier IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments boolean_expression Expression qui renvoie TRUE ou FALSE. Si l’expression booléenne contient une SELECT instruction, l’instruction SELECT doit être placée entre...
syntaxsql คัดลอก IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Argumentsboolean_expressionAn expression that returns TRUE or FALSE. If the boolean_expression contains a SELECT statement, the SELECT statement must be ...
syntaxsql Copy IF boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments boolean_expression An expression that returns TRUE or FALSE. If the boolean_expression contains a SELECT statement, the SELECT statement must be enclosed in parenthes...
syntaxsql IFboolean_expression{sql_statement|statement_block} [ELSE{sql_statement|statement_block} ] Arguments boolean_expression An expression that returnsTRUEorFALSE. If the Boolean expression contains aSELECTstatement, theSELECTstatement must be enclosed in parentheses. ...