Therefore, optionally you can use the ELSE condition within the IF…ELSE statement. You should not use an ELSE IF condition in the IF ELSE statement. But, you can use nested (multiple) IF ELSE statements to obtain your results. Let’s have a quick example to learn the IF ELSE statements...
Second, IF statement condition is FALSE, it does not print the message inside IF statement block 其次,IF语句条件为FALSE,它不会在IF语句块内打印消息 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 t...
SELEC…在 SQL Server 中，可以使用 IF...ELSE IF 语句来根据条件执行不同的操作。IF...ELSE IF ...
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...
IF statement, you are actually nesting an IF statement inside of the ELSE part of an outer IF statement. You therefore need one END IF for each nested IF and one for the parent IF...ELSE. (Note that the logic in this program can be simplified considerably by calculating each employee's...
SQL If语句是一种条件语句,用于根据指定条件执行不同的操作。它可以根据条件的真假来决定执行哪个查询语句。 合并2个查询是指将两个查询的结果合并为一个结果集。可以使用UNION操作符来实现。 下...
We use the if statement to check if the film with id (0) exists and raise a notice if it does not. if not found then raise notice'The film % could not be found', input_film_id; end if; If you change the value of the input_film_id variable to some value that exists in the ...
SQL 过程中的 IF 语句 可使用 IF 语句来根据条件满足状态而有条件进入某个逻辑。IF 语句在逻辑上等价于带有搜索式 CASE 语句 WHEN 子句的 CASE 语句。 IF 语句支持使用可选 ELSE IF 子句和缺省 ELSE 子句。END IF 子句是指示语句结尾所必需的。 以下是包含 IF 语句的过程的示例:...
1. IF Syntax Issue Problem description: The Oracle database prompts an unsupported SQL92 token. Solution: The Oracle statement is incorrectly written. The parameter in${if(...)}is added with${}, which should be removed. 2. An Extra Quotation Mark or Extra Parenthesis ...
sql_statement | statement_block: A single or multiple statements that need to be executed. 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...