Limiting number of rows in a table in sqlite

Hi there,
How can I limit the number of records in a table.  I want to limit the number of records to, say 100, and get an error when trying to insert a new entry and this limit is already happened.
ambuliAsked:
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Julian HansenCommented:
You can use a trigger something like this

CREATE
    TRIGGER  `TrLimitRows` BEFORE INSERT
    ON `YourTable`
    FOR EACH ROW BEGIN
	SELECT COUNT(*) INTO @totrows FROM `YourTable`;
	IF (@totrows >= 100) THEN
	    SIGNAL SQLSTATE '45000'
	        SET MESSAGE_TEXT = 'YOUR ERROR MESSAGE HERE';
	END IF;
    END

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Julian HansenCommented:
Just thought of another (as yet untried) method of doing this

If you have not already add an autoincrement field to the database and give it a type of tiny int.

Then default your autoincrement to start at sizeof(tinyint) - total records you want in the table

sizeof(tinyint) = 1 byte - max for this is 127

Set your default AUTOINCREMENT value

ALTER TABLE yourtable AUTO_INCREMENT=27

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MySQL Server

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