Sql delete duplicate

-- Oracle
DELETE films
WHERE rowid NOT IN (
    SELECT min(rowid)
    FROM films
    GROUP BY title, uk_release_date
);

How to remove duplicate in sql

Distinct: helps to remove all the duplicate
records when retrieving the records from a table.

SELECT DISTINCT FIRST_NAME FROM VISITORS;

Sql 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;

Source: designcise.com

Similar codes

1 vote176 views1 answer
Import sql file mysql commadn line
SQL
0 vote164 views1 answer
How many columns can be used for creating index?
SQL
0 vote170 views1 answer
MySQL error code 2068
SQL
0 vote157 views1 answer
Postgresql newline character
SQL
5 votes171 views1 answer
Mysql count lines
SQL
0 vote239 views1 answer
Sql select max value for each group
SQL
4 votes169 views1 answer
Oracle show error line number
SQL
0 vote180 views1 answer
Typical max-connect-errors mysql
SQL
0 vote182 views1 answer
Get last updated row sql server
SQL
0 vote177 views1 answer
Postgresql using reserved word as column name
SQL