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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();
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 ;
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. The WHERE clause specifies which record (s) that should be updated.
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.
6 sty 2022 · CASE can sometimes be used to combine multiple conditions into a single Update, but reading such makes my brain hurt. If one Update is modifying column(s) that the following Updates will be testing, be sure to run the Updates in a suitable order.
To filter data by multiple conditions in a WHERE clause, use the AND operator to connect the conditions. Here’s what this looks like for two conditions: WHERE condition1 AND condition2. In our example, condition1 is dept = 'Finance' and condition2 is salary > 4000.
