如果满足条件,则在 IF 关键字及其条件之后执行 Transact-SQL 语句:布尔表达式返回 TRUE。 可选的 ELSE 关键字引入另一个 Transact-SQL 语句,当不满足 IF 条件时就执行该语句:布尔表达式返回 FALSE。 Transact-SQL 语法约定 语法 syntaxsql 复制 IF Boolean_expression { sql_statement | statement_block } [ ...
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--===
If the weather becomes good, I will plan to go on a bike trip or else I won’t 如果天气转好,我会计划骑自行车旅行,否则我不会 In these examples, we decide as per the conditions. For example, if I get a bonus then only I will go for an international vacation else I will go for d...
Syntaxsyntaxsql העתק 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 enclosed...
Syntax If_Else_Statement := 'IF'Boolean_Expression'THEN'U-SQL_Statement[ 'ELSEIF'Boolean_Expression'THEN'U-SQL_Statement] [ 'ELSE'Boolean_Expression'THEN'U-SQL_Statement] 'END'. Remarks Boolean_Expression Is a constant-foldable expression that returns TRUE or FALSE. ...
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...
Syntax Copy IF Boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments Boolean_expression Is an expression that returns TRUE or FALSE. If the Boolean_expression contains a SELECT statement, the SELECT statement must be enclosed in parenthe...
type == TYPE_SQLTYPE)) { pos -= 1; sf->stats_folds += 1; left = 0; continue; } else if ( ( && st_is_unary_op(&sf->tokenvec[left+1])) { pos -= 1; sf->stats_folds += 1; if (left > 0) { left -= 1; } continue; } else if (syntax_merge_words(sf, &sf->...
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. ...
Transact-SQL Syntax Conventions Syntax Copy IF Boolean_expression { sql_statement | statement_block } [ ELSE { sql_statement | statement_block } ] Arguments Boolean_expression Is an expression that returns TRUE or FALSE. If the Boolean expression contains a SELECT statement, the SELECT statemen...