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NgKH
Starting Member
15 Posts |
 Posted - 2003-04-02 : 12:02:04
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| how do you do an insert into table <A> select b.1, c.2 from b, c, where...statement such that it writes minimal to transaction log.. performancewise.. it is faster? Assume A has just been created with no contents, or just been truncatedi know that instead of delete all records in a table you can simpily truncate it.. truncate the table won't logs transaction logs.. are there some kind of simular ways for insert? |
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nr
SQLTeam MVY
12543 Posts |
Posted - 2003-04-02 : 12:49:32
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| No.The truncate just logs the deallocation of the pages there isn't an equivalent for insert or update.You can do a non-logged bcp to insert data though. A bcp out + bcp in may be faster that an insert for a lot of data.Truncate is usually a bad idea too as it affects permissions, backups, database setup, ...==========================================Cursors are useful if you don't know sql.DTS can be used in a similar way.Beer is not cold and it isn't fizzy. |
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Bambola
Posting Yak Master
103 Posts |
Posted - 2003-04-02 : 14:37:58
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quote:
Truncate is usually a bad idea too as it affects permissions, backups, database setup, ...
How does it affect permissions etc?Bambola. |
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nr
SQLTeam MVY
12543 Posts |
Posted - 2003-04-02 : 14:51:12
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| From bolTRUNCATE TABLE permissions default to the table owner, members of the sysadmin fixed server role, and the db_owner and db_ddladmin fixed database roles, and are not transferable.==========================================Cursors are useful if you don't know sql.DTS can be used in a similar way.Beer is not cold and it isn't fizzy. |
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How to write fast insert statement