usp_querysequence(insrt_sql);end; 最后,oracle数据库insert后获取insert数据的自增id值:(ADO.net中,可以直接调用该存储过程) createorreplaceprocedureusp_querysequence ( insrt_sqlinvarchar2, SEQ_NAMEinvarchar2,newidoutnumber)isstr_sqlvarchar(100);beginexecuteimmediate insrt_sql; str_sql :='select'||S...
若username='chenhaha'的记录不存在,INSERT语句将插入新记录,否则,当前username='chenhaha'的记录将被更新,更新的字段由UPDATE指定。 对了,ON DUPLICATE KEY UPDATE为MySQL特有语法,比如在MySQL迁移Oracle或其他DB时,类似的语句要改为MERGE INTO语法,兼容性让人想骂街。但没办法,就像用WPS写的xlsx用Office无法打开一...
InsertQuery (IQ) is a Business Intelligence technology company that specializes in building on all software solutions and implementations to unite all databases into one Data Warehouse that can be used for Analytics, reports, dashboards, KPIs and Machine
Thetable_collection_expressionlets you inform Oracle that the value ofcollection_expressionshould be treated as a table for purposes of query and DML operations. Thecollection_expressioncan be a subquery, a column, a function, or a collection constructor. Regardless of its form, it must return a...
The simplest way to create an Oracle INSERT query to list the values using the VALUES keyword. For example: INSERT INTO suppliers (supplier_id, supplier_name) VALUES (5000, 'Apple'); This Oracle INSERT statement would result in one record being inserted into thesupplierstable. This new record...
Oracle recyclebin过大导致Insert逻辑读暴增的原理是什么? 墨墨导读:某客户的数据库一条insert某段时间突然变慢,平均单次执行逻辑读暴增至20万,本文分享整个处理过程。 概述 某客户的数据库一条insert语句某段时间突然变慢,平均单次执行逻辑读暴增至20万,最终定位为insert时因可用空间不充足递归清理recyclebin中的...
一旦表被划分成块,Oracle启用并行的子查询(有时称为杂务进程),每个子查询同时读取一个大型表中的一块。所有子查询完毕以后,Oracle将结果会传给并行查询调度器,他会重新安排数据,如果需要则进行排序,并且将结果传递给最终用户。OPQ具有无限的伸缩性,因此,以前需要花费几分钟的全表检索目前的响应时间却不到1秒。
但是接下来在Oracle中就遇到麻烦了,记得在Oracle 9i之后就有一条Merge into 的语句可以同时进行Insert 和Update的吗,Merge的语法如下: MERGE INTO table_name alias1 USING (table|view|sub_query) alias2 ON (join condition) WHEN MATCHED THEN UPDATE table_name ...
obclient> INSERT INTO tbl VALUES(1,2,3); Query OK, 1 row affected obclient>INSERT ALL WHEN col2 > 1 THEN INTO tbl1 VALUES(10,11,12) WHEN col3 > 1 THEN INTO tbl2 VALUES(22,23,24) ELSE INTO tbl1 VALUES(33,34,35) SELECT col2,col3 FROM tbl; Query OK, 2 rows affected Reco...
obclient>INSERT INTO tbl VALUES(1,2,3);Query OK,1row affected obclient>INSERT ALL WHEN col2>1THEN INTO tbl1 VALUES(10,11,12)WHEN col3>1THEN INTO tbl2 VALUES(22,23,24)ELSE INTO tbl1 VALUES(33,34,35)SELECT col2,col3 FROM tbl;Query OK,2rows affected Records:2Duplicates:0Warnings...