在ORACLE数据库中,表与表之间的SQL JOIN方式有多种(不仅表与表,还可以表与视图.物化视图等联结),官方的解释如下所示 A join is a query that combines rows from two or more tables, views, or materialized views. Oracle Database performs a join whenever multiple tables appear in the FROM clause of the que…
ORACLE的SQL JOIN方式大全 在ORACLE数据库中,表与表之间的SQL JOIN方式有多种(不仅表与表,还可以表与视图.物化视图等联结),官方的解释如下所示 A join is a query that combines rows from two or more tables, views, or materialized views. Oracle Database performs a join whenever multiple tables appear in the FR…
Change the Target Recovery Time of a Database (SQL Server) 间接checkpoints flushcache flushcache-message https://msdn.microsoft.com/en-us/library/hh403416.aspx 间接checkpoints在SQL Server2012开始引入 sql2012的target recovery time就是强制做checkpoint,强制人工干预之前的reco…
Recently researched about database SQL scripts auto management tools, recorded the results here. Researched 3 tools used a lot from internet surfing, as well as posts and blogs of other developers. DBdeploy http://dbdeploy.com/ This is a Ant plugin t…