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  1. stackoverflow.com › questions › 17265522sql - Conditional UPDATE in MySQL - Stack Overflow

    23 cze 2013 · I am trying to UPDATE values from a table, but I need to add some conditions. I found the function CASE, but I am not if it is the best method. Here is an example.

  2. dba.stackexchange.com › questions › 36747IF NOT NULL then UPDATE else keep the value of the field

    I think this will solve the issue: UPDATE DeviceAttribute. SET Details = CASE Name. WHEN 'Accessories' THEN COALESCE(@Accessories, Details) WHEN 'Description' THEN COALESCE(@Description, Details) WHEN 'Specification' THEN COALESCE(@Specification, Details) ELSE Details. END.

  3. www.geeksforgeeks.org › how-to-update-null-values-in-a-field-in-mysqlHow to Update NULL Values in a Field in MySQL - GeeksforGeeks

    17 maj 2024 · Updating a column with a NULL value in MySQL is surprisingly straightforward. Check out this basic syntax: UPDATE table_name. SET column_name= 'N/A' WHERE condition; table_name: The name of your table. column_name: The column you want to turn into NULL. condition: When you want to be selective. If you skip this, it'll update all rows.

  4. dirask.com › posts › MySQL-UPDATE-query-with-IF-condition-conditional-update-pOv4JDMySQL - UPDATE query with IF condition (conditional update)

    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:

  5. dba.stackexchange.com › questions › 77969insert row if table is empty, else update row (mysql)

    30 wrz 2014 · if (table2 is empty) insert into table2 (table2.starttime, table2.endtime) value (table1.starttime, table1.endtime (last row)) else if (TIMESTAMPDIFF(SECOND,table2.endtime(last row),table1.starttime(lastrow))<10) update table2.endtime (last row) value (table1.endtime) else.

  6. www.w3schools.com › mysql › mysql_updateMySQL UPDATE Statement - W3Schools

    Notice the WHERE clause in the UPDATE statement. The WHERE clause specifies which record(s) that should be updated. If you omit the WHERE clause, all records in the table will be updated!

  7. dev.mysql.com › doc › refmanMySQL :: MySQL 8.0 Reference Manual :: 13.2.13 UPDATE Statement

    The WHERE clause, if given, specifies the conditions that identify which rows to update. With no WHERE clause, all rows are updated. If the ORDER BY clause is specified, the rows are updated in the order that is specified. The LIMIT clause places a limit on the number of rows that can be updated.

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