Search results
1 lut 2010 · Here's a query to update a table based on a comparison of another table. If record is not found in tableB, it will update the "active" value to "n". If it's found, will set the value to NULL. UPDATE tableA LEFT JOIN tableB ON tableA.id = tableB.id SET active = IF(tableB.id IS NULL, 'n', NULL)"; Hope this helps someone else.
26 lut 2014 · Here’s a snippet of SQL code and a procedure for updating a MySQL database table using a subquery and data from Microsoft Excel (or similar).
In this article, we would like to show you UPDATE query with IF condition in MySQL. Quick solution: UPDATE `table_name` SET `column_name` = IF(condition , if_true, if_false); Practical example. To show UPDATE query with IF condition, we will use the following users table:
21 sie 2024 · The IF statement is a control flow structure used to execute SQL code based on conditions, whereas the IF() function is a MySQL function used within queries to return a value based on whether a condition is true or false.
26 kwi 2020 · The UPDATE statement can be used to update a single column, a larger set of records (through the use of conditions), and/or the entire table in a database. The condition (s) can be a boolean, a string check, or mathematical sequence that resolves to a boolean (greater than, less than, etc.).
18 lut 2018 · Use either of the methods above for the table B update, but do both tables separately: UPDATE A SET A.col1 = 'abc', A.col2 = 'xyz' WHERE A.col3 = '1' ; UPDATE B INNER JOIN ( SELECT 'a' AS col1, 'x' AS col2, '1' AS col3 UNION ALL SELECT 'b', 'y', '2' UNION ALL SELECT 'c', 'z', '3' ) AS fltr ON B.col3 = fltr.col3 SET B.col1 = fltr.col1, B.col2 ...
How to connect to a MySQL database from Excel, fetch the latest data from it, and work with that data inside your spreadsheets in Excel. This tutorial is step-by-step and shows you how to do everything, from downloading the ODBC drivers (explained in the tutorial) to importing and transforming the data from specific tables in MySQL.
