1: create procedure PerformantSP_Grid_Results_Using_CaseWhen 2: AS 3: BEGIN 4: select S.empid,S.empname, 5:case when T.deptid>1 and S.salary>5000 then T.deptname 6: when T.deptid=1 and S.salary>10000 then'Management deparments' endas deptname 7: ,S.salary 8: from Employees s...
子查询(Subquery)是指嵌套在其它查询中的查询。 子查询提供了一种除使用连接和组合查询外的,执行复杂操作的可行性方法。 可根据子查询是否涉及外部查询,将子查询分为相关子查询(correlated subquery)和非相关子查询(uncorrelated subquery, or independent subquery)。相关子查询在WHERE子句中,引入外层查询的列值作为判定...
Select *FROM ItemMasters--Distinct -> To avoid the Duplicate records we use the distinct in select statement-- for example in this table we can see here we have the duplicate record 'Chiken Burger'-- but with different Item_Code when i use the below select statement see what happenSelect ...
If a subquery (inner query) returns a null value to the outer query, the outer query will not return any rows when using certain comparison operators in a WHERE clause. Type of Subqueries Scalar Subquery: Returns a single value. Column Subquery: Returns a single column of values Multiple col...
sql 语法 case when--demo1 case 搜索函数 case when xxx then xxx else end select id, case when score < 60 then 'low' when score < 90 then 'middle' else 'high' end as rank from test --demo2 简单 case 函数 case field when xxx then xxx else end ...
possibly many query, again, if more than 1 row is returned as below. I can't use the In operator as I need my subquery to return more than 1 field, so I am trying the Exists operator. But when I use the Exists operator in my query, only the record with empl_uno of 2979 is ...
It can't include a COMPUTE or FOR BROWSE clause, and can only include an ORDER BY clause when a TOP clause is also specified. A subquery can be nested inside the WHERE or HAVING clause of an outer SELECT, INSERT, UPDATE, or DELETE statement, or inside another subquery. Up to 32 ...
、Silver（银卡）或Bronze（铜卡）。SELECTcustomer_name,CASEWHENtotal_purchases>=10000THEN'Gold'WHEN...
order.by.col.ambiguous in.subquery.without.result ctas.if.not.exists worker.restart.instance.timeout divide.nan.or.overflow small.table.exceeds.mem.limit sigkill.oom wm_concat.first.argument.const pt.implicit.convertion.failed having.use.select.alias dynamic.pt.to.static lot.not.in.subquery为什么...
warn("Query server failed when calling accept.", e); } } } } ExecutorService 线程 LoopHandler 处理: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 @Override public void run() { try { // Set thread local info context.setThreadLocalInfo(); context.setConnectScheduler(ConnectScheduler....