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ROW_NUMBER() equivalent in MySQL for inserting?
There is no equivalent of ROW_NUMBER() in MySQL for inserting but you can achieve this with the help of variable. The syntax is as follows −
SELECT (@yourVariableName:=@yourVariableName + 1) AS `anyAliasName`, yourColumnName1,yourColumnName2,...N FROM yourTableName ,(SELECT @yourVariableName:=0) AS anyAliasName;
To understand the above syntax, let us create a table. The query to create a table is as follows −
mysql> create table RowNumberDemo -> ( -> UserId int, -> UserName varchar(20) -> ); Query OK, 0 rows affected (0.74 sec)
Insert some records in the table using insert command. The query is as follows −
mysql> insert into RowNumberDemo values(10,'John'); Query OK, 1 row affected (0.14 sec) mysql> insert into RowNumberDemo values(50,'Carol'); Query OK, 1 row affected (0.20 sec) mysql> insert into RowNumberDemo values(100,'Sam'); Query OK, 1 row affected (0.20 sec) mysql> insert into RowNumberDemo values(150,'Mike'); Query OK, 1 row affected (0.54 sec) mysql> insert into RowNumberDemo values(210,'Bob'); Query OK, 1 row affected (0.58 sec)
Display all records from the table using select statement. The query is as follows −
mysql> select *from RowNumberDemo;
The following is the output −
+--------+----------+ | UserId | UserName | +--------+----------+ | 10 | John | | 50 | Carol | | 100 | Sam | | 150 | Mike | | 210 | Bob | +--------+----------+ 5 rows in set (0.00 sec)
Here is the query to get something like ROW_NUMBER equivalent −
mysql> SELECT -> (@ROW_NUMBER:=@ROW_NUMBER + 1) AS `ROW_NUMBER`, UserId,UserName -> FROM -> RowNumberDemo,(SELECT @ROW_NUMBER:=0) AS t;
The following is the output −
+------------+--------+----------+ | ROW_NUMBER | UserId | UserName | +------------+--------+----------+ | 1 | 10 | John | | 2 | 50 | Carol | | 3 | 100 | Sam | | 4 | 150 | Mike | | 5 | 210 | Bob | +------------+--------+----------+ 5 rows in set (0.03 sec)
Updated on: 30-Jul-2019
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