Insert statement with variable : Variable « Select Clause « SQL / MySQL






  1. SQL / MySQL
  2. Select Clause
  3. Variable

Insert statement with variable

       
mysql>
mysql> CREATE TABLE VARIABLES
    ->       (VARNAME   CHAR(30) NOT NULL PRIMARY KEY,
    ->        VARVALUE  CHAR(30) NOT NULL);
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> SET @VAR1 = 100, @VAR2 = 'John';
Query OK, 0 rows affected (0.00 sec)

mysql>
mysql> INSERT INTO VARIABLES VALUES ('VAR1', @VAR1);
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> INSERT INTO VARIABLES VALUES ('VAR2', @VAR2);
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> SELECT   @VAR1 := VARVALUE
    -> FROM     VARIABLES
    -> WHERE    VARNAME = 'VAR1';
+-------------------+
| @VAR1 := VARVALUE |
+-------------------+
| 100               |
+-------------------+
1 row in set (0.00 sec)

mysql>
mysql> SELECT   @VAR2 := VARVALUE
    -> FROM     VARIABLES
    -> WHERE    VARNAME = 'VAR2';
+-------------------+
| @VAR2 := VARVALUE |
+-------------------+
| John              |
+-------------------+
1 row in set (0.00 sec)

mysql>
mysql> SELECT   @VAR1, @VAR2;
+-------+-------+
| @VAR1 | @VAR2 |
+-------+-------+
| 100   | John  |
+-------+-------+
1 row in set (0.00 sec)

mysql>
mysql> drop table variables;
Query OK, 0 rows affected (0.00 sec)








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