MySQL query to count the number of 0s and 1s from a table column and display them in two columns?

MySQLMySQLi Database

For this, you can use the aggregate function SUM(). Let us first create a table −

mysql> create table DemoTable
(
   isMarried tinyint(1)
);
Query OK, 0 rows affected (0.84 sec)

Insert some records in the table using insert command −

mysql> insert into DemoTable values(0);
Query OK, 1 row affected (0.26 sec)
mysql> insert into DemoTable values(1);
Query OK, 1 row affected (0.11 sec)
mysql> insert into DemoTable values(1);
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable values(0);
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable values(1);
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values(1);
Query OK, 1 row affected (0.20 sec)
mysql> insert into DemoTable values(0);
Query OK, 1 row affected (0.12 sec)

Display all records from the table using select statement −

mysql> select *from DemoTable;

This will produce the following output −

+-----------+
| isMarried |
+-----------+
|         0 |
|         1 |
|         1 |
|         0 |
|         1 |
|         1 |
|         0 |
+-----------+
7 rows in set (0.00 sec)

Following is the query to count the number of 0s and 1s from one column and display them in two columns −

mysql> select sum(tbl.isMarried=1) as all_one_count,
   sum(tbl.isMarried=0) as all_zero_count,
   sum(tbl.isMarried in(0,1)) as all_zero_count_and_one_count
   from DemoTable tbl;

This will produce the following output −

+---------------+----------------+------------------------------+
| all_one_count | all_zero_count | all_zero_count_and_one_count |
+---------------+----------------+------------------------------+
|             4 |              3 |                            7 |
+---------------+----------------+------------------------------+
1 row in set (0.04 sec)
raja
Published on 25-Sep-2019 11:48:01
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