- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
MySQL query to count all the column values from two columns and exclude NULL values in the total count?
Let us first create a table −
mysql> create table DemoTable1975 ( StudentName varchar(20), StudentMarks int ); Query OK, 0 rows affected (0.00 sec)
Insert some records in the table using insert command −
mysql> insert into DemoTable1975 values('John',45);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1975 values('Chris',67);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1975 values('David',59);
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1975 values('Bob',NULL);
Query OK, 1 row affected (0.00 sec)Display all records from the table using select statement −
mysql> select * from DemoTable1975;
This will produce the following output −
+-------------+--------------+ | StudentName | StudentMarks | +-------------+--------------+ | John | 45 | | Chris | 67 | | David | 59 | | Bob | NULL | +-------------+--------------+ 4 rows in set (0.00 sec)
Here is the query to count all the column values −
mysql> select count(StudentName)+count(StudentMarks) from DemoTable1975;
This will produce the following output −
+----------------------------------------+ | count(StudentName)+count(StudentMarks) | +----------------------------------------+ | 7 | +----------------------------------------+ 1 row in set (0.00 sec)
Updated on 31-Dec-2019 07:56:49
- Related Questions & Answers
- How to use a single MySQL query to count column values ignoring null?
- How to count null values in MySQL?
- Count NOT NULL values from separate tables in a single MySQL query
- MySQL query to exclude some of the values from the table
- Count only null values in two different columns and display in one MySQL select statement?
- MySQL query to calculate the total amount from column values with Cost and Quantity?
- MySQL query to return the count of only NO values from corresponding column value
- Count zero, NULL and distinct values except zero and NULL with a single MySQL query
- MySQL query to get the count of values and display the count in a new column ordered in descending order
- MySQL query to count the duplicate ID values and display the result in a separate column
- Ignore NULL values from separate tables in a single MySQL query and display count of NOT NULL records
- MySQL query to replace only the NULL values from the table?
- MySQL query to count the number of 0s and 1s from a table column and display them in two columns?
- MySQL query to match any of the two strings from column values
- Get the count of duplicate values from a single column in MySQL?
Advertisements