sortingParams WHERE i."TenderId" = 1 AND i."ItemInfo" ->> 'Name' like '%Transcend%' ORDER BY case WHEN columnName like '%ItemId%' THEN i."ItemId"::bigint end asc nulls last --puts things with an itemID ahead of those without, or could use nulls first --if...
SELECT column1, column2, CASE WHEN column1 = LAG(column1) OVER (ORDER BY column2) THEN '条件1' WHEN column2 > LAG(column2) OVER (ORDER BY column2) THEN '条件2' ELSE '条件3' END AS condition FROM your_table; 在上面的示例中,我们使用LAG函数获取前一行的column1和column2的值,并与...
... ORDER BY CASE WHEN boolean_column is true THEN text_column END ASC, CASE WHEN boolean_column is false THEN text_column END DESC Is it somehow possible to replace the second CASE in an ELSE? It feels odd to have two conditions instead of a regular if else/when else as you norma...
SELECTe.first_name,e.last_name,e.salary,CASEWHENe.salary<5000THEN'低'WHENe.salary<15000THEN'中'ELSE'高'ENDASsalary_levelFROMemployeeseORDERBYCASEWHENe.salary<5000THEN3WHENe.salary<15000THEN2ELSE1END,first_name;first_name|last_name|salary|salary_level|---|---|---|---|Lex|DeHaan|17000...
WHEN pln_status ='批复'THEN 5 WHEN pln_status ='初设'THEN 6 WHEN pln_status ='开工'THEN 7 END SELECT *FROM person ORDER BY CASE constellation WHEN'白羊'THEN1WHEN'金牛'THEN2WHEN'双子'THEN3WHEN'巨蟹'THEN4WHEN'狮子'THEN5WHEN'处女'THEN6WHEN'天秤'THEN7WHEN'天蝎'THEN8WHEN'射手'THEN9WHEN...
SELECTt1.id,t1.type,t1."产品代码",t1."日期",t1."数量",t1."出_汇总",t1.rk,t1.rk_ct,t1."入_递增",CASEWHEN(((t1."出_汇总"-t1."入_递增")>(0)::numeric)AND(t1.rk<>t1.rk_ct))THEN(0)::numericELSE(t1."入_递增"-t1."出_汇总")ENDAS"出_入差异"FROM(SELECTi.id,i....
语法:case when <求值表达式> then <表达式> When <求值表达式> then <表达式> When <求值表达式> then <表达式> ... Else <> End 六、集合运算 1.Union表的加法 2.Union all包含重复行 3.Except记录的减法(Oracle中使用minus 4.Inner join内联结 ...
4 case表达式 Case表达式的作用:相对于条件判断的函数,用来判断每一行是不是满足相应的条件。 4.1 表达式: Case when <判断表达式> then <表达式> when <判断表达式> then <表达式> when <判断表达式> then <表达式> …… Else<表达式> End 4.2 查询学生的学号,课程号,成绩并判断成绩是否及格 ...
case when (now()-query_start) is null then 'NULL' else (now()-query_start)::text end||chr(10)|| 'SQL (Current SQL in Transaction): '||chr(10)|| case when current_query is null then 'NULL' else current_query::text end, chr(10)||'---'||chr(10) order by ( case mode w...
PostgreSQL使用OVER和PARTITION BY子句有区别吗?查看文档和其他示例,我看不出使用LEAD子句有什么区别,但这似乎是这个查询中的问题所在。 select a.key, a.date as effdate, case when LEAD(a.date) OVER (PARTITION BY a.key ORDER BY a.date) is null then '2200-01-01'::date ...