The DBMS_SQLTUNE package provides an interface to manage SQL tuning sets. This package provides the same subprograms, although in some cases with slightly different names, as the SQL tuning set subprograms in DBMS_SQLTUNE. The difference is that DBMS_SQLSET does not require the Oracle Tuning...
setline300pages999coluserhostfora30colos_usernamefora10colusernamefora8colaction_namefora8colsql_textfora80colownerfora8colobj_namefora20colcurrent_userfora12altersessionsetnls_date_format='yyyy-mm-dd hh24:mi:ss';selectos_username,username,userhost,timestamp,owner,obj_name,sql_text,current_userfrom...
(六)Set Operation The set operation UNION , INTERSECT and EXCEPT operate on relations and correspond to the relational algebra operations ∪,∩and – UNIONINTERSECTEXCEPT 1.UNION:用于合并两个或多个SELECT语句的结果集, 并且去除重复的行。它相当于数学中的并集操作。 INTERSECT:用于返回两个或多个SELECT...
DBMS_SHARED_POOL.PURGE is available from 11.1. In 10.2.0.4, it is available through the fix forBug 5614566. However, the fix is event protected. You need to set the event 5614566 to make use of purge. Unless the event is set, dbms_shared_pool.purge will have no effect. Set the even...
SQL_POS_OPERATIONS 2.0 一个SQLINTEGER 位掩码,枚举 SQLSetPos 中的支持操作。以下位掩码与标志一起使用,以确定支持哪些选项。SQL_POS_POSITION (ODBC 2.0)SQL_POS_REFRESH (ODBC 2.0)SQL_POS_UPDATE (ODBC 2.0)SQL_POS_DELETE (ODBC 2.0)SQL_POS_ADD (ODBC 2.0) SQL_PROCEDURE_TERM 1.0 包含过程数据源供...
SQL_BS_SELECT_PROC = The driver supports explicit procedures that can have result-set generating statements.SQL_BS_ROW_COUNT_PROC = The driver supports explicit procedures that can have row-count generating statements. SQL_BOOKMARK_PERSISTENCE 2.0 An SQLUINTEGER bitmask enumerating the operations ...
through the fix forBug 5614566. However, the fix is event protected. You need to set the event 5614566 to make use of purge. Unless the event is set, dbms_shared_pool.purge will have no effect. Set the event 5614566 in the init.ora to turn purge on. ...
這是呼叫 SQLFetch 或 SQLFetchScroll 所要傳回的資料列數目,或是由呼叫 SQLBulkOperations 或 SQLSetPos 來操作的資料列數目。 在APD 中,這個 SQLULEN 標頭欄位會指定每個參數的值數目。 此欄位的預設值為 1。 如果SQL_DESC_ARRAY_SIZE大於 1、SQL_DESC_DATA_PTR、SQL_DESC_INDICATOR_PTR,以及 APD ...
SQL> set linesize 1200; 1. SQL> select * from scott.dept where deptno=40; 1. 1. DEPTNO DNAME LOC 1. --- --- --- 1. 40 OPERATIONS BOSTON 1. 1. SQL> select sql_id, first_load_time 1. 2 from v$sql 1. 3 where sql_text ...
③ 在含有子查询的SQL语句中,要特别注意减少对表的查询,例如形如“UPDATE AAA T SET T.A=(...) T.B=(...) WHERE ...;”该更新的SQL语句中小括号中的大表都是一样的,且查询非常相似,这个时候可以修改为:“UPDATE AAA T SET (T.A,T.B)=(...) WHERE ...;”。 (40)SQL语句统一使用大写。因...