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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
24 paź 2015 · ON DUPLICATE KEY UPDATE. highest_mark = GREATEST(highest_mark, VALUES(highest_mark)) we can use MySQL GREATEST function to update a column if value is greater than current value. if the value being updated is greater than existing value, it.
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);
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.
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.
The IF statement has three forms: IF...THEN statement: Evaluate one condition and execute a code block if the condition is true. IF...THEN...ELSE statement: Evaluate one condition and execute a code block if the condition is true; otherwise, execute another code block. IF...THEN...ELSEIF...ELSE statement: Evaluate multiple conditions and ...
2 cze 2017 · I want to retrieve the row if any of the 3 integer field in a row is greater than zero. All the field has default value of zero. Which of the following query is better? -- Query 1. SELECT * FROM my_table WHERE number_A > 0 OR number_B > 0 OR number_C > 0. -- Query 2.
