If a student gets more than 90% marks, it should display a message from the first IF statement 如果学生获得90%以上的分数,则应显示第一条IF语句中的消息 If a student gets more than 80% marks, it should display a message from the second IF statement 如果学生获得超过80%的分数,则应显示第二...
一、IF用法的基本语法 IF用法的基本语法如下: ```sql IFconditionTHEN SELECTstatement ELSE SELECTstatement ENDIF; ``` 其中,condition是一个布尔表达式,用于指定条件。如果条件为真,则执行第一个SELECT语句;否则,执行第二个SELECT语句。 二、IF用法的应用场景 1.条件筛选:根据不同的条件,对查询结果进行筛选。例如...
If you need cloud Postgres, get the free plan on Neon. Summary: in this tutorial, you will learn how to use the PL/pgSQL if statements to execute a command based on a specific condition. Introduction to PL/pgSQL IF Statement The if statement allows you to execute one or more ...
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...
or is less than the company average. When you use this form of the 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...
一、IF语句 IF语句是SQL中最常用的判断语句之一，它用于根据条件执行不同的操作。IF语句的基本语法如下：```IF condition THEN statement1;ELSE statement2;END IF;```其中，condition为判断条件，可以使用比较运算符（如=、>、<）或逻辑运算符（如AND、OR）组合而成。如果condition为真，则执行statement1；如果...
Below are some of the scenarios where the UPDATE Statement can be used in SQL. Data Entry Mistakes: UPDATE can be easily used to fix the incorrect data that is entered. Changing multiple values: If there is a change in prices or stock levels, then the UPDATE Statement can be used on ...
一:if 在动态 SQL 中所做的最通用的事情是包含部分 where 字句的条件 用and or拼接test的条件 select * from pojo where 1=1<!--name是map中的key,不可改 是对参数的判断 该boolean表达式可用and or 拼接--><iftest="name!=null">and name=#{name}</if> test表达式的坑 单个字符比较需要变成字符串,...
IF student_marks>= 40 PRINT ‘You passed the exam’; ELSE PRINT ‘You failed’; GO From the above IF ELSE statement, we are testing a condition product_price < 150 or not. If yes, it will print ,‘Hi’. If the above condition is false, it will print, ‘Hello’. ...
This SQL Server tutorial explains how to use the IF...ELSE statement in SQL Server (Transact-SQL) with syntax and examples. In SQL Server, the IF...ELSE statement is used to execute code when a condition is TRUE, or execute different code if the conditio