Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
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CREATE TABLE t(number VARCHAR(100) NOT NULL);
INSERT INTO t VALUES ('Ол-12/2003'), ('Ол-7/2003'), ('Ол-12/2012');
SELECT * FROM t;
SELECT t.*, SUBSTRING_INDEX(SUBSTRING_INDEX(number, '/', 1), '-', -1) FROM t ORDER BY CAST(SUBSTRING_INDEX(number, '/', -1) AS UNSIGNED INTEGER) DESC, CAST(SUBSTRING_INDEX(SUBSTRING_INDEX(number, '/', 1), '-', -1) AS UNSIGNED INTEGER) ASC
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