To include multiple statements, enclosed them between BEGIN and END keywords. The ELSE block is optional. If the Boolean expression with the IF statement returns FALSE, then the control is passed to the ELSE statement. If the condition in the IF block returns TRUE, then the SQL statement ...
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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,如果条件为true,则执行IF块中提到的语句,否则将执行ELSE子句中的语...
SQL SELECT INTO 语句 SELECT INTO 语句将数据从一个表复制到一个新表中。...SQL SELECT INTO 示例以下 SQL 语句创建 Customers 的备份副本: SELECT * INTO CustomersBackup2017 FROM Customers; 以下...SQL 语句使用 IN 子句将表复制到另一个数据库中的新表中: SELECT * INTO CustomersBackup2017 IN ...
其中,search_condition 参数表示条件判断语句,如果返回值为 TRUE ,相应的 SQL 语句列表(statement_list)被执行;如果返回值为 FALSE,则 ELSE 子句的语句列表被执行。statement_list 可以包括一个或多个语句。 注意:MySQL 中的 IF( ) 函数不同于这里的 IF 语句。 例1 下面是一个使用 IF 语句的示例。代码如下:...
$snowSqlParam= @('--accountname',$Endpoint'--username',$Credential.UserName'--option','exit_on_error=true''--option','output_format=csv''--option','friendly=false''--option','timing=false'if($Debug) {'--option','log_level=DEBUG'}if($Path) {'--filename',$Path}else{'--query'...
The following example has a Boolean expression (1 = 2) that is false, and therefore prints the second statement. SQL IF 1 = 2 PRINT 'Boolean expression is true.' ELSE PRINT 'Boolean expression is false.'; GO B. Use a query as part of a Boolean expression ...
SQL Server Subquery with nested if else conditionSQL uses "case expressions" instead of if/else ...
Criteria包含一个Cretiron的集合,每一个Criteria对象内包含的Cretiron之间是由AND连接的,是逻辑与的关系。 oredCriteria Example内有一个成员叫oredCriteria,是Criteria的集合,就想其名字所预示的一样,这个集合中的Criteria是由OR连接的,是逻辑或关系。oredCriteria就是ORed Criteria。
if/then else case statement query in SQL ServerThis creates start and end columns by doing a ...