Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to count the number of columns having specific value in MySQL?
Following is the syntax −
select sum(yourColumnName1+yourColumnName2+yourColumnName3...N) as `anyAliasName1`, sum(yourColumnName1 and yourColumnName2 and yourColumnName3….N) as anyAliasName from yourTableName;
Let us create a table −
mysql> create table demo36 −> ( −> id int not null auto_increment primary key, −> value1 int, −> value2 int, −> value3 int −> ); Query OK, 0 rows affected (1.68 sec)
Insert some records into the table with the help of insert command −
mysql> insert into demo36(value1,value2,value3) values(1,0,0); Query OK, 1 row affected (0.14 sec) mysql> insert into demo36(value1,value2,value3) values(1,0,1); Query OK, 1 row affected (0.11 sec) mysql> insert into demo36(value1,value2,value3) values(1,1,1); Query OK, 1 row affected (0.22 sec) mysql> insert into demo36(value1,value2,value3) values(0,1,0); Query OK, 1 row affected (0.12 sec) mysql> insert into demo36(value1,value2,value3) values(1,1,0); Query OK, 1 row affected (0.10 sec)
Display records from the table using select statement −
mysql> select *from demo36;
This will produce the following output −
+----+--------+--------+--------+ | id | value1 | value2 | value3 | +----+--------+--------+--------+ | 1 | 1 | 0 | 0 | | 2 | 1 | 0 | 1 | | 3 | 1 | 1 | 1 | | 4 | 0 | 1 | 0 | | 5 | 1 | 1 | 0 | +----+--------+--------+--------+ 5 rows in set (0.00 sec)
Following is the query to count the number of columns having specific value in MySQL −
mysql> select −> sum(value1+value2+value3) as `Total_Number_Of_1`, −> sum(value1 and value2 and value3) as `Total_Number_Of_Rows_With_1` −> from demo36;
This will produce the following output −
+-------------------+-----------------------------+ | Total_Number_Of_1 | Total_Number_Of_Rows_With_1 | +-------------------+-----------------------------+ | 9 | 1 | +-------------------+-----------------------------+ 1 row in set (0.00 sec)
Updated on: 19-Nov-2020
190 Views
Advertisements