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Will MySQL work if we won’t include the size of VARCHAR while creating a new table?
No, the query won’t work. Let’s create the same scenario and check the error −
mysql> create table DemoTable1821 ( Id int, FirstName varchar, LastName varchar ); ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ', LastName varchar )' at line 4
To remove the above error, you need to give the size of varchar(10). Let us first create a table −
mysql> create table DemoTable1821 ( Id int, FirstName varchar(10), LastName varchar(10) ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1821 values(1,'John','Smith'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1821 values(2,'John','Doe'); Query OK, 1 row affected (0.00 sec) mysql> insert into DemoTable1821 values(3,'Adam','Smith'); Query OK, 1 row affected (0.00 sec)
Display all records from the table using select statement −
mysql> select * from DemoTable1821;
This will produce the following output −
+------+-----------+----------+ | Id | FirstName | LastName | +------+-----------+----------+ | 1 | John | Smith | | 2 | John | Doe| | 3 | Adam | Smith | +------+-----------+----------+ 3 rows in set (0.00 sec)
Updated on: 24-Dec-2019
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