Insert multiple rows in a single sql query

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  http://www.xaprb.com/blog/2006/02/21/flexible-insert-and-update-in-mysql/
When using IGNORE, MySQL prints information about duplicates: Query OK, 2 rows affected (0.02 sec) Records: 3 Duplicates: 1 Warnings: 0 This method is probably the fastest of all, especially if very few duplicate keys exist in t2. MySQL allows multiple-table updates, which can be used to mark which rows are duplicates during the UPDATE, eliminating the need for an exclusion join in the INSERT

sql server - Combine column from multiple rows into single row - Database Administrators Stack Exchange

  http://dba.stackexchange.com/questions/17921/combine-column-from-multiple-rows-into-single-row
CLR function will be reusable in other queries, and you won't have to duplicate (and debug) a complex subquery every time you need to do this type of thing. EDIT: Well, I went to try to see if this actually was better, and it turns out the requirement that the comments be in a specific order is currently not possible to satisfy using an aggregate function

  http://www.karlrixon.co.uk/writing/update-multiple-rows-with-different-values-and-a-single-sql-query/
This is no problem a lot of the time, as the fields to update may all need to be changed to the same value, in which case you might run a query like the following. Rather than setting a field to a particular value, a CASE operator is used to determine which of a set of values is used based on a given condition, in this case if the value of the id field matches the specified id

Inserting multiple rows in one SQL statement

  http://blog.bflarsen.com/?p=7
Updating indexes is often the slowest part of inserting rows into a table, and inserting several at one time only rebuilds the index once (after all the rows are added) rather than once per row. Why I used UNION ALL instead of UNION UNION ALL will offer significantly better performance than UNION, because the UNION command assumes that if there are duplicates they should be removed (mathematically speaking, the union of two sets includes only one copy of the overlapped region.) If you use UNION ALL, it keeps both copies of the overlapped region

  http://blog.sqlauthority.com/2012/08/29/sql-server-three-methods-to-insert-multiple-rows-into-single-table-sql-in-sixty-seconds-024-video/
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sql - Is it possible to insert multiple rows at a time in an SQLite database? - Stack Overflow

  http://stackoverflow.com/questions/1609637/is-it-possible-to-insert-multiple-rows-at-a-time-in-an-sqlite-database
The problem with the other solution is that you lose the order of the inserting insert into mytable (col) select 'c' union select 'd' union select 'a' union select 'b'; In the sqlite the data will be store a,b,c,d... Sqlite is much faster when you use parameterized queries (far less parsing needed) so I wouldn't concatenate big statements like this: insert into mytable (col1, col2) select 'a','b' union select 'c','d' union ..

  http://blog.sqlauthority.com/2008/07/02/sql-server-2008-insert-multiple-records-using-one-insert-statement-use-of-row-constructor/
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sql server - Inserting multiple rows in a single SQL query? - Stack Overflow

  http://stackoverflow.com/questions/452859/inserting-multiple-rows-in-a-single-sql-query
INSERT INTO Table ( Column1, Column2 ) VALUES ( Value1, Value2 ), ( Value1, Value2 ) For reference to this have a look at MOC Course 2778A - Writing SQL Queries in SQL Server 2008