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How to skip blank and null values in MySQL?
To skip blank and null in MySQL, use the following syntax:
select *from yourTableName where yourColumnName IS NOT NULL AND yourColumnName <> '';
Let us first create a table:
mysql> create table DemoTable (Id int, FirstName varchar(20)); Query OK, 0 rows affected (0.66 sec)
Following is the query to insert records in the table using insert command:
mysql> insert into DemoTable values(100,'Larry'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(101,''); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(102,'Chris'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(103,null); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(104,' '); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(105,'Robert'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(106,null); Query OK, 1 row affected (0.13 sec)
Following is the query to display records from the table using select command:
mysql> select *from DemoTable;
This will produce the following output with blank values and NULL:
+------+-----------+ | Id | FirstName | +------+-----------+ | 100 | Larry | | 101 | | | 102 | Chris | | 103 | NULL | | 104 | | | 105 | Robert | | 106 | NULL | +------+-----------+ 7 rows in set (0.00 sec)
Following is the query to skip blank values as well as null in MySQL:
mysql> select *from DemoTable where FirstName IS NOT NULL AND FirstName <> '';
This will produce the following output
+------+-----------+ | Id | FirstName | +------+-----------+ | 100 | Larry | | 102 | Chris | | 105 | Robert | +------+-----------+ 3 rows in set (0.03 sec)
Updated on: 30-Jul-2019
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