In default, it deallocates all space except the space allocated by MINEXTENTS unless you specify REUSE STORAGE clause. 二、不从tablespace中腾出空间,需要 ALTER TABLESPACE AAA COALESCE; 才有空间 三、truncate 调整high water mark 而delete不.truncate之后,TABLE的HWM退回到 INITIAL和NEXT的位置(默认) dele...
However, MyISAM is the default storage engine chosen by MySQL database, when creating a new table. The major differences between MyISAM and InnoDB storage engines are : 1. Referential Integrity Referential integrity ensures that relationships between tables remain consistent. Or more specifically, thi...
generally in sql server we are using the terms SPID and session_id .can i know what is the difference between them ?Thanks.All replies (1)Tuesday, October 9, 2018 2:06 PM ✅Answeredhttps://dba.stackexchange.com/questions/145032/differences-between-spid-and-session-idPlease use Marked ...
SQL> CREATE TABLE START (T1 INT); CREATE TABLE START (T1 INT) ORA-00903: invalid table name 利用双引号可以成功将保留词用作对象名,但是在管理时会很麻烦,极力不推荐! SQL> CREATE TABLE "START" (T1 INT); Table created SQL> SELECT * FROM START; SELECT * FROM START ORA-00903: invalid tabl...
Difference between ClassNotFoundException and NoClassDefFoundError java jar .net d3 perl difference between UIImageView and drawInRect http://stackoverflow.com/questions/3838725/what-is-the-difference-between-uiimageview-and-drawinrectI want to display so many images in table cells. I ipad ide ipho...
tablespace). I am not suggesting that flash is fast enough so that this overspill can now be tolerated for all workloads; it will still be faster to perform sorts, for example, in memory. But when sizing these areas it is normal to pick a value that will encompass most tasks and then ...
What is the difference between drop and truncate and delete command in SQL, SQL TRUNCATE statement is useful for deleting all rows present in a table with the intent of freeing up table space. SQL Delete statement comes in handy for deleting rows from an
Reason:When you type DELETE.all the data get copied into the Rollback Tablespace first.then delete operation get performed.Thatswhy when you type ROLLBACK after deleting a table ,you can get back the data(The system get it for you from the Rollback Tablespace).All this process take time....