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Can you check for both a blank string and 0 in one condition with a single MySQL query?
Yes, we can check for a blank string and 0 in a single condition. Let us first create a table −
mysql> create table DemoTable ( ClientId varchar(40) ); Query OK, 0 rows affected (1.01 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable values('CLI-01');
Query OK, 1 row affected (0.36 sec)
mysql> insert into DemoTable values('0');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable values('CLI-02');
Query OK, 1 row affected (0.31 sec)
mysql> insert into DemoTable values('CLI-00');
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable values('');
Query OK, 1 row affected (0.14 sec)
mysql> insert into DemoTable values('CLI-98');
Query OK, 1 row affected (0.09 sec)Display all records from the table using select statement −
mysql> select *from DemoTable;
This will produce the following output −
+----------+ | ClientId | +----------+ | CLI-01 | | 0 | | CLI-02 | | CLI-00 | | | | CLI-98 | +----------+ 6 rows in set (0.00 sec)
Following is the query to check for both a blank string and 0 in a single condition −
mysql> select *from DemoTable where ClientId IN('0','');This will produce the following output −
+----------+ | ClientId | +----------+ | 0 | | | +----------+ 2 rows in set (0.00 sec)
Updated on: 10-Oct-2019
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