Get count of zeros for columns values declared with INT type in MySQL


For this, you can use LENGTH() along with REPLACE(). Let us first create a table −

mysql> create table DemoTable
(
   Value int
);
Query OK, 0 rows affected (1.22 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(10002000);
Query OK, 1 row affected (0.09 sec)
mysql> insert into DemoTable values(00000);
Query OK, 1 row affected (0.17 sec)
mysql> insert into DemoTable values(400560);
Query OK, 1 row affected (0.19 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+----------+
| Value    |
+----------+
| 10002000 |
|        0 |
|   400560 |
+----------+
3 rows in set (0.00 sec)

Following is the query to get the count of zeros −

mysql> select (length(Value)-length(replace(Value,'0',''))) AS NumberOfZeros from DemoTable;

This will produce the following output −

+---------------+
| NumberOfZeros |
+---------------+
|             6 |
|             1 |
|             3 |
+---------------+
3 rows in set (0.00 sec)

Updated on: 30-Sep-2019

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