when >= 3000 then 'T2' when >= 4000 then 'T3' when >= 5000 then 'T4' else 'T5' end as salary_level from staff ; -- ERROR 1064 (42000): You have an error in your SQL syntax; 3. 使用 CASE [col_name] WHEN [expr1] THEN [result1]… ELSE [default] END 如下语句不报错,但是...
selectname,salary,casesalarywhen>=2000then'T1'when>=3000then'T2'when>=4000then'T3'when>=5000then'T4'else'T5'endassalary_levelfromstaff ;-- ERROR 1064 (42000): You have an error in your SQL syntax; 3. 使用 CASE [col_name] WHEN [e...
For the record: syntax without CASE variable works: :) SELECT :-] number, :-] CASE :-] WHEN number=0 THEN number+1 :-] WHEN number=1 THEN number*10 :-] ELSE number :-] END :-] FROM system.numbers :-] WHERE number < 10 :-] LIMIT 10; SELECT number, caseWithoutExpression(numb...
As of Spark 1.2.0, the more traditional syntax is supported, in response to SPARK-3813: search for "CASE WHEN" in the test source. For example: SELECT CASE WHEN key = 1 THEN 1 ELSE 2 END FROM testData Update for most recent place to figure out syntax from the SQL Parser The pars...
case when then else end 可以像java中的if一样条件显示 第一种方式: 第二种方式: 场景1:有分数score,score<60返回不及格,score>=60返回及格,score>=80返回优秀 场景2:现老师要统计班中,有多少男同学,多少女同学,并统计男同学中有几人及格,女同学中有几人及格,要求用一个SQL输出结果。 场景3:经典行转列...
可能是由于以下几个原因: 1. 语法错误:在编写CASE WHEN语句时,需要确保语法正确。CASE WHEN语句的基本语法是:CASE WHEN condition1 THEN result1 W...
TokenDescriptor closureToken= allTokens.get(tokenLen - 1);if(!"end".equalsIgnoreCase(closureToken.getRawWord())) {thrownewSyntaxException("case..when..表达式未闭合"); }//暂只支持 case when xxx then xxx... end 语法//不支持 case field_name when 1 then '1'... end, 即单字段判定不支持...
Syntax: CASE WHEN condition1 THEN result1 WHEN condition2 THEN result2 WHEN conditionN THEN resultN ELSE result END; Probably would fit well as another method on ExpressionBuilder, ie: db.selectFrom("table") .select(eb => { return eb.case(cb => { return cb.when("expression1", "express...
CaseWhen ELSE END语句 一、简介、CaseWhen ELSE END共有两种用法: 说实话,这种就是数据库版的switch语句,但是只是形式上很像,实际上还是有差别的!!!...1、CASEWHEN THEN ELSE END 第一种用法CASE(表达式) WHEN 值 THEN result1 WHEN 值 THEN result2 ... ...WHEN 值 THEN resultN ELSE default_result...
用开关语句 CASE WHEN <条件表达式> THEN <为真返回值> ELSE <为假返回值> END CopySELECT *, CASE WHEN Password IS NOT NULL THEN 'Yes' ELSE 'No' END AS PasswordPresent FROM myTable 资料来源: https://stackoverflow.com/questions/14580294/sqlite-syntax-for-if-else-condition/14581068 分类: ...