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1 lut 2010 · update table set a = if(a > 0 and a < 1, 1, if(a > 1 and a < 2, 2, a)) where a is not null; you might want to use CEIL() if A is always a floating point value > 0 and <= 2 Share
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:
Use the GREATEST() function (this needs a CAST() as well): UPDATE my_table SET comments = GREATEST(CAST(comments AS signed)-3, 0) WHERE something = 123; or the IF() function: UPDATE my_table SET comments = IF(comments>3, comments-3, 0) WHERE something = 123; or a CASE expression:
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.
Definition and Usage. The IF () function returns a value if a condition is TRUE, or another value if a condition is FALSE. Syntax. IF (condition, value_if_true, value_if_false) Parameter Values. Technical Details. More Examples. Example. Return 5 if the condition is TRUE, or 10 if the condition is FALSE: SELECT IF(500<1000, 5, 10);
15 mar 2012 · UPDATE table SET A = 20 WHERE A > 20; UPDATE table SET A = 0 WHERE A <= 1; When A is NULL, it will not meet either of these conditions, and thus eliminates the need to specify that A not be NULL. Next, there's no need for the third condition as @Andre suggested.
26 kwi 2020 · Here is a simple query with one condition statement: UPDATE Work_Tickets SET Billed = true WHERE UnitCost <> 0.00. This query will update the Billed field to be true on every line that matches the condition of the UnitCost not equaling 0. After we run our query, the dataset will look like this:
