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Editorial Team
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Asked: 2026-05-26T17:58:20+00:00

I am using PHP with an odbc connection to MSSQL database. Currently, I having

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I am using PHP with an odbc connection to MSSQL database.

Currently, I having around 1900 insert statements, in the one string, separated by a semicolon, and running that in 1 odbc_execute statement.

Firstly, is this a bad method? Should I be processing every insert statement separately in a for loop?

Also, the way I am currently doing it, with 1 big statement, for some reason, only a maximum of 483 rows are being inserted with no errors. If I copy the statement that is run and run this through SQL studio, all rows insert, yet every single time, only a maximum of 483 rows insert.
Any ideas why this could be?

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1 Answer

  1. Editorial Team

    One network round trip per INSERT will mean a lot of latency. It’ll be very slow.

    There’s probably a limit on the buffer size of all those concatenated SQL statements.

    I think you want to use a prepared statement and bound variables:

    http://msdn.microsoft.com/en-us/library/windows/desktop/ms712553(v=vs.85).aspx

    You can still process it in a loop – two, actually. You’ll want an inner loop to add INSERTs to a batch that’s executed as a single transaction, and an outer loop to process all the necessary batches.

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