Why is MySQL stored procedure not exit loop?
MySQL stored procedure: loop through table, delete rows. Logic problem: won’t exit loop because of LIMIT option in query – Database Administrators Stack Exchange MySQL stored procedure: loop through table, delete rows. Logic problem: won’t exit loop because of LIMIT option in query
How to delete many rows from table using id?
You can of course limit for some IDs using other WHERE clause : DELETE FROM tableName WHERE ID IN (1,2) — add as many ID as you want. This will keep only some records and discard others.
How to delete files where ID is not null?
Whenever possible, perform DELETEs within a transaction (assuming supported – IE: Not on MyISAM) so you can use rollback to revert changes in case of problems. DELETE FROM blob WHERE fileid NOT IN (SELECT id FROM files WHERE id is NOT NULL/*This line is unlikely to be needed but using NOT IN…*/
Which is the last ID in the table?
The last id in the table is 7817. The statement says to get 1000 rows starting with the last id deleted in the previous pass (7000) and return one row (the last row) of the result set. The last id would of the result set would be 7999, but that doesn’t exist in the table.
How to loop through a table in MySQL?
I want to output data from every table that contains a first_name column. I put together the following procedure, but in my loop, mysql interprets the table name literally instead of evaluating the variable table_name.
How to run a procedure in SQL Server?
The procedure uses a card code value for getting the information about the employee. What I want to do is select all of the CardCodes from one table, then loop through each record running the stored procedure and then making a table with the results of each one. so by the end there will be one table with each employees worked times.
How to create a stored procedure in MySQL?
First, generate a file input.sql containing: changing and to appropriate values ( can be any database you have permission to access). If you don’t run into any errors, then you should have stored procedures defined for every database.
MySQL stored procedure: loop through table, delete rows. Logic problem: won’t exit loop because of LIMIT option in query I’ve created a procedure to loop through large InnoDB tables and delete a chunk of rows, then pause and repeat until max field value allowed is reached.
How to call existinf procedure in MySQL?
You SELECT the values you want to pass, from wherever you’re getting them (which could be a temporary table, base table, or view, and can include calls to stored functions) and then call your existinf procedure with those values. Here is a syntactically valid example of the necessary code, with comments to explain what each component is doing.