sql exclude duplicates and find even id
SELECT DISTINCT city FROM tablename WHERE id % 2 = 0sql exclude duplicates and find even id
SELECT DISTINCT city FROM tablename WHERE id % 2 = 0sql delete duplicate rows but keep one
# Step 1: Copy distinct values to temporary table
CREATE TEMPORARY TABLE tmp_user (
SELECT id, name
FROM user
GROUP BY name
);
# Step 2: Remove all rows from original table
DELETE FROM user;
# Step 3: Remove all rows from original table
INSERT INTO user (SELECT * FROM tmp_user);
# Step 4: Remove temporary table
DROP TABLE tmp_user;Copyright © 2021 Codeinu
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