db2 drop temporary table

into as the table variables in the current session for convenience. Global temporary tables: you can use the drop to be displayed in temp in multiple sessions. (It is easier to create a temporary table without knowing the table s

SQL Server creates a temporary table: Create temporary table Method 1: Create Table # temporary table name (Field 1 constraints, Field 2 constraints, .....) Create

temporary table, and then run the query on these tables. It is easy to CREATE a TEMPORARY MySQL TABLE, and the TEMPORARY keyword is added to the normal create table statement: SQL code CREATE

TEMP1; --Delete temporary table spaceDROP tablespace TEMP including CONTENTS and datafiles; --Clean up temporary table spaceALTER tablespace TEMP SHRINK SPACE KEEP 20M;--Take the initiative to narrow the table space's temporary f

We often see DB2 table join operations. The following describes the principle of DB2 table join in detail. If you are interested in this, take a look. In DB2, the optimizer can select nested connections or merge connections. If correct, you can also select hash connections.

Mssql temporary table creation code ifobject_id (tempdb. dbo. # table) isnotnull nbsp; droptable # tablegocreatetable # table ([field] type) the code above checks whether a temporary table exists # If it exists, delete it, otherw

') is NULL PRINT ' not exists ' ELSE PRINT ' exists ' ALTER TABLE name D ROP constraint default value name go ALTER TABLE table name drop column Column name going-------determine if object_id (' tempdb.dbo. #Test ') is present to create a temporary

current session ends (the user Exits normally/the user does not exit normally/the Oracle instance crashes). Oracle deletes the data in this session (Oracle truncate table ). But it does not affect the data of any other sessions. 2. Features A. After temporary table data is cleared automatically, the structure and metadata of the

1, create the method: Method One: CREATE TABLE TemptablenameOrSelect [Field 1, Field 2,...,] into temptablename from table Method Two: CREATE table tempdb. mytemptable (Tid int) Description(1), the temporary table is actually placed in the database tempdb in a user

the databaseALTER DATABASE DEFAULT temporary tablespace TEMP1;--Delete temporary table spaceDROP tablespace TEMP including CONTENTS and datafiles;--Clean up temporary table spaceALTER tablespace TEMP SHRINK SPACE KEEP 20M;--Automatically reduce the tablespace's

1. Background* temporary table is session-based, only visible on current connection* When this connection (session) is closed, it will be automatically drop. * two different connections (sessions) Use the same temporary table name and do not conflict with each other, or use

This article mainly describes the SQL Server temporary tables and table variables, as well as the differences between SQL Server temporary tables and table variables, when using tables in a database, we generally encounter two ways to use tables, namely using temporary table

execution efficiency of the preceding statement is very low. You can consider creating a temporary table. We need to judge the repeated fields and rowid to be inserted into the temporary table, and then compare them When deleting the table. Create