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$con = new mysqli('localhost','user1','password','my_database'); $query = "Update MyTable SET col1='some value' WHERE id=1 LIMIT 1;"; $query .= "UPDATE MyTable SET col1='other value' WHERE id=2 LIMIT 1;"; //etc $con->multi_query($query); $con->close(); Hope that helps.
16 kwi 2016 · In MySQL, you can use tuple comparison: WHERE (TestId, TestSubId) IN ((10,25), (11,22)) That looks nice and succinct, although, as ypercubeᵀᴹ mentioned in a comment, it may not work well performance-wise.
18 lut 2018 · You can use below one for one table if you want to update many columns of one table. UPDATE table SET col1 = CASE WHEN col3 = 'name1' THEN 'a' WHEN col3 = '2' THEN b ELSE 0 END , col2 = CASE WHEN col3 = '1' THEN 'b' WHEN col3 = 'name2' THEN 'c' ELSE '' END ;
26 cze 2024 · Updating table rows using subqueries in MySQL enables precise modifications based on specific conditions or values from other tables. This technique leverages subqueries within the SET or WHERE clauses of the UPDATE statement, allowing dynamic and context-specific updates.
For the multiple-table syntax, UPDATE updates rows in each table named in table_references that satisfy the conditions. Each matching row is updated once, even if it matches the conditions multiple times. For multiple-table syntax, ORDER BY and LIMIT cannot be used.
16 lut 2024 · In this article, we’ll learn the use of the CASE statement, IF() function, INSERT ... ON DUPLICATE KEY UPDATE clause and UPDATE with JOIN() function to update multiple columns in multiple rows with different values in MySQL.
29 gru 2017 · You will need to write very complicated conditions if you want to update more than two rows. In such a case you can use INSERT ... ON DUPLICATE KEY UPDATE approach.
