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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.
If you're using PHP, you can use mysqli to do multi statements (I think php has shipped with mysqli for a while now) $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 ...
8 kwi 2024 · In this article, we will learn how to update multiple columns in MySQL using UPDATE and SET commands. We will cover the syntax and examples, providing explanations to help you understand how to update multiple columns in SQL with a single query.
In this tutorial, you will learn how to use the MySQL UPDATE statement to update data in a table. Introduction to MySQL UPDATE statement. The UPDATE statement updates data in a table. It allows you to change the values in one or more columns of a single row or multiple rows. The following illustrates the basic syntax of the UPDATE statement:
11 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.
The MySQL UPDATE Statement. The UPDATE statement is used to modify the existing records in a table. UPDATE Syntax. UPDATE table_name. SET column1 = value1, column2 = value2, ... WHERE condition; Note: Be careful when updating records in a table! Notice the . WHERE clause in the UPDATE statement.
16 lut 2024 · We update multiple columns on multiple rows with different values using the CASE statement that goes through all conditions and outputs an item (value) when the first condition is satisfied (like the if-then-else statement).
