In this query, the IIF function is used as an SQL if statement in select to categorize departments into 'Core' and 'Support'. If an employee is from the 'IT' or 'HR' department, they are categorized as 'Core'; otherwise, they are categorized as 'Support'....
Statement:语句,通常指整个SQL文本 Clause:子句,通常指SQL文本中的一部分,如From子句、Where子句、Group By子句 Query:查询,通常指SQL文本在系统中的一次执行实例 Database:库,一个库可以有多个表;含义类似的有:模式(Schema) Table:表,一个表可以有很多行;含义类似的有:关系(Relation) Row:行,一行可以有很多列;...
在简单的SQL SELECT查询中,IF..ELSE语句用于根据特定条件执行不同的操作。它允许我们在查询结果中根据条件返回不同的值或执行不同的逻辑。 IF..ELSE语句的语法如下: 代码语言:txt 复制 IF condition THEN statement1; ELSE statement2; END IF; 其中,condition是一个条件表达式,如果该条件为真,则执行statement1...
```sql SET @result = (SELECT @num * 2); -- 创建表达式@num * 2,并将结果赋值给@result 1. 2. 3. 4. 5. 6. ### 3. 使用IF语句判断变量的值 ```markdown ```sql IF @result > 15 THEN -- 使用IF语句判断@result的值是否大于15 SELECT 'Greater than 15'; -- 如果大于15,则输出'Gr...
Java Statement 执行插入sql的返回结果 java执行select Java SE基础(三)流程控制 概述 顺序结构 选择结构 if-else语句 switch-case语句 循环结构 for语句 while语句 do-while语句 注意 死循环与跳转控制语句 概述 流程控制就是使用流程控制语句来控制程序的执行流程。Java程序的执行流程分为:顺序结构、选择结构、循环...
SQL Statement is: SELECT FROM subscribers WHERE (username='".$user1."' AND userpass='".$pass1."') Then I would like to have an IF statement that interrogates something that would be 0 or null if there were no records found on the select. ...
SQL複製 SELECTOrderDate,COUNT(OrderID)ASOrdersFROMSales.SalesOrderWHEREStatus='Shipped'GROUPBYOrderDateHAVINGCOUNT(OrderID) >1ORDERBYOrderDateDESC; 此查詢包含一個由多個子句所組成的 SELECT 陳述式,其中每個子句都會定義必須套用至所擷取資料的特定作業。 雖然我們不會在本課程模組中討論不同子句的詳細資料,但在...
IF THEN in SQL SELECT StatementI recently came across the CASE WHEN statement work Similar to IF statement into SQL SELECT , Maybe you’ll find it useful. Create table called Student using SQL Query:? CREATE TABLE [dbo].[Student]( [StudentID] [int] NULL, [Marks] [float] NULL )Insert...
SELECT Statement Example?If we want to display the first and last name of an employee combined together, the SQL Select Statement would be likeSELECT first_name + ' ' + last_name FROM employee; Output: first_name + ' ' + last_name --- Rahul Sharma Anjali Bhagwat Stephen Fleming She...
s tStatement = ##class(%SQL.Statement).%New() s qStatus = tStatement.%Prepare(.myquery) if qStatus '= 1 { w "%Prepare failed:" d $System.Status.DisplayError(qStatus) q } s rset = tStatement.%Execute() if rset.%SQLCODE=0 { ...