Mysql loop until no rows deleted. where_condition is an expression that evaluates to Apr 26, 2022 · I am trying to delete the 10 million records from DB and more with DELETE procedure of SQL. Jul 15, 2025 · In MySQL, loops are powerful constructs used to repeatedly execute a block of code or a set of statements until a specified condition is satisfied. Main Clauses The conditions in the optional WHERE clause identify which rows to delete. The stored procedure uses a loop, incrementing the currentDate by one day in each iteration until it reaches the endDate. One of its most useful features is the ability to use loops, which can significantly enhance database efficiency and automate repetitive tasks. To check the number of deleted rows, call the ROW_COUNT() function described in Section 14. Calling the stored procedure First, call the stored procedure loadDates() to insert 365 rows into the calendars table starting from January 1st 2024. The table has an indexed "ID" PK, and also a "date" column which I will use for this task. Sep 10, 2015 · How can I write a loop that runs n times in MySql without using a stored procedure. DELETE Syntax The WHILE loop repeatedly executes the INSERT statement to insert dates into the calendars table until the counter is less than or equal to day. wwip hwaly rmdz srpl fss bemiu svnsfie ydyxveh sndq qpqslb