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select DATEDIFF(customer.dob, '2010-01-01') / 365.25 as age. will firstly yield a negative result (the arguments to DATEDIFF are in the wrong order), and secondly will produce inaccurate results for some dates, e.g.: SELECT DATEDIFF('2010-05-11','1984-05-11') / 365.25 AS age. produces the result:
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:
6 sty 2022 · SELECT case_id, cat, birth, c_type, CASE -- 1st section: WHEN (COUNT(case_id) OVER (PARTITION BY case_id)) = 1 THEN CASE WHEN (DATEDIFF(NOW(), birth) / 365.25) >= 21 THEN 'SINGLE_PERSON' ELSE 'UNKNOWN' END -- 2nd section: WHEN COUNT(case_id) OVER (PARTITION BY case_id) = 2 AND SUM(CASE WHEN cat = 'WIFE' THEN 1 ELSE 0 END) OVER (PARTITION BY ...
5 wrz 2016 · Is it possible to get the from_days (datediff (now (), user_birthdate)) factored into a single call without a nested query? user_id, year(from_days(datediff(now(), user_birthdate))) as years, month(from_days(datediff(now(), user_birthdate))) as months.
You should use this format in UPDATE expressions and in the WHERE clause of SELECT statements. For example: SELECT * FROM t1 WHERE date >= '2003-05-05'; As a convenience, MySQL automatically converts a date to a number if the date is used in numeric context and vice versa.
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.
31 lip 2015 · Full query text to update: UPDATE table_a set age = timestampdiff(year, dob, curdate()) WHERE MONTH(dob) = MONTH(CURRENT_TIMESTAMP) AND DAYOFMONTH(dob) = DAYOFMONTH(CURRENT_TIMESTAMP);
