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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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