I am trying to write a query with a subquery. The subquery returns what is in the attached image below. select top(1) with ties matter_uno, PART_CAT_CODE, EFF_DATE, EMPL_UNO from TBM_CLMAT_PART where MATTER_UNO = 11275 and PART_CAT_CODE = 'BILL' order by eff_date desc Note: ...
2SQL*Net roundtripsto/fromclient 0 sorts (memory) 0 sorts (disk) 1rowsprocessed SQL> 从执行计划可以看到,确实出现了两次访问底层表sales! 这条SQL语句的执行时间是1.68秒,cost 是753, 物理I/O为18. (这跟Adrian的测试结果差了很多,可能是由于数据量的问题) 然后再看看用With 语句把重复访问表的部分抽...
(SELECTFIRSTNMECONCAT' 'CONCATMIDINITCONCAT' 'CONCATLASTNAMEFROMEMPLOYEE XWHEREX.EMPNO = Y.MGRNO) AS MANAGER_NAMEFROMDEPARTMENT YWHEREMGRNOIS NOT NULL For each row returned for DEPTNO and DEPTNAME, the system finds where EMPNO = MGRNO and returns the manager's name. The result table produce...
sql_cond - subquery Syntax ... ( SELECT{select_clause FROMsource} |{FROMsource FIELDSselect_clause} [WHEREsql_cond] [GROUP BYgroup][HAVINGgroup_cond] [UNION[ALL|DISTINCT]select]) ... Effect Asubqueryof theWHEREcondition is a parenthesizedSELECTstatement in which all additions exceptSINGLE,...
the subquery is not introduced with EXISTS. Solution / Work Around : One way to avoid this error is to follow the suggestion of the error message and provide only one expression, or one column, in the SELECT subquery statement. SELECT [OrderHeaderID], [OrderDate], [OrderDescription], [Tot...
Using a Subquery in a SQL Server SELECT Statement WHERE Clause One of the most common places to invoke a subquery is in the WHERE clause of a SELECT statement. The inner query may come from the same source or a different source as the outer SQL statement. When the inner query needs to...
with a DDS Table Creating a Datasource Connection with an Oracle Table Views Checking the Execution Plan Data Permissions Management Data Types User-Defined Functions Built-in Functions Basic SELECT Statements Filtering Sorting Grouping JOIN Subquery Subquery Nested by WHERE Subquery Nested by FROM ...
You can write a subquery in an expression or in a Structured Query Language (SQL) statement in SQL view. In this article Use the results of a query as a field in another query Use a subquery as a criterion for a query field Common SQL keywords tha...
Description: MySQL return wrong results for query with subquery in select part. How to repeat: Load dump into database and launch following statement: select USR.id, ( select COUNT(*) from projects P where P.user_id = USR.id and P.status <> 0 and P.deleted = 0 and DATE(P.date) ...
FIELDSselect_clause} |{select_clause FROMsource} [WHEREsql_cond] [GROUP BYgroup][HAVINGgroup_cond] [ORDER BY[UP TO n ROWS[OFFSET o]]] [db_hints]... Possibleclauses and additionsofsubqueriesof aWITHstatement. These clauses define the results set of acommon table expression. ...