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Why is SQL Server table insert performance worse?
Worse performance because of log file growth although the database is in simple recovery mode. These findings led me to including the actual execution plan which shows that 89% of the cost lies in the table insert.
How to insert a select into a temp table?
The SELECT returns 138 results, but inserting in the TABLE variable takes 1min15 but when I use a temp table with the same SELECT, woops, takes 0sec : CREATE TABLE #temp (iId_company INT) INSERT INTO #temp (iId_company) SELECT id FROM
How to insert select ID into a table?
DECLARE @tblTemp TABLE (iId_company INT) INSERT INTO @tblTemp (iId_company) SELECT id FROM ….. The SELECT returns 138 results, but inserting in the TABLE variable takes 1min15 but when I use a temp table with the same SELECT, woops, takes 0sec :
When to use table expression in SQL Server?
It may be applied anywhere a table or table expression is used in SELECT, INSERT, UPDATE, and DELETE statements. However, table may not be used in the following statements:
Why does SQL Server insert into large table take so long?
Recently I have experimented with changing the clustered index of the large table to an identity int column, which has brought the insert down from 3 hours to one hour, but I am still puzzled why this simple query should take so long to run (regardless of the size of the table) CREATE TABLE [dbo].
How to optimize large SQL Server inserts, updates and deletes?
These are the IO results: Table ‘MyTestTable’. Scan count 1, logical reads 65415, physical reads 2, read-ahead reads 65398, lob logical reads 0, lob physical reads 0, lob read-ahead reads 0. The SELECT took 1:08 minutes and retrieved 2,395,317 rows. For the same SELECT we implement the following process to do it in batches:
How big is a table in SQL Server?
I have a large table in a SQl Server 2008 database, it has about 570 million records. Every day we run a batch job that takes a file of 200,000 or so transaction records, does a group by and sum against this data and inserts it into the large table.