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1 lut 2010 · UPDATE Table. SET A = '1' IF A > 0 AND A < 1. SET A = '2' IF A > 1 AND A < 2. WHERE A IS NOT NULL; I have seen CASE expression and IF expression in Procedures and Functions but I want to use it in a simple update/select statement.
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:
UPDATE returns the number of rows that were actually changed. The mysql_info() C API function returns the number of rows that were matched and updated and the number of warnings that occurred during the UPDATE. You can use LIMIT row_count to restrict the scope of the UPDATE.
6 sty 2022 · END AS c_t FROM ( SELECT case_id, cat, birth, (SELECT COUNT(c2.case_id) FROM cas c2 WHERE c2.case_id = c1.case_id GROUP BY c2.case_id) AS c_cnt, (SELECT SUM(CASE WHEN c3.cat = 'WIFE' THEN 1 ELSE 0 END) FROM cas c3 WHERE c3.case_id = c1.case_id GROUP BY c3.case_id) AS w_cnt, (SELECT FLOOR(MIN(DATEDIFF(NOW(), c4.birth) / 365.25)) FROM cas c4 ...
The IF statement can have THEN, ELSE, and ELSEIF clauses, and it is terminated with END IF. If a given search_condition evaluates to true, the corresponding THEN or ELSEIF clause statement_list executes. If no search_condition matches, the ELSE clause statement_list executes.
21 paź 2014 · IF (SELECT COUNT(*) FROM table WHERE language_id=1 AND item_code='PH001') > 0 THEN UPDATE_QUERY; ELSE INSERT_QUERY; END IF;
Use IF...THEN...ELSEIF...ELSE statement to evaluate multiple conditions sequentially and execute corresponding blocks of statements based on the first true condition, with an optional block of statements to execute if none of the conditions is true.
