Sql count(*)

Sql count

/*COUNT(column_name) will return the number of rows from the column 
that are not NULL*/
SELECT COUNT(column_name)
FROM table_name;

/*COUNT(*) will return the number of rows from the table*/
SELECT COUNT(*)
FROM table_name;

To count number of rows in SQL table

SELECT count(*)
FROM information_schema.columns
WHERE table_name = 'Your_table_nale';

Sql count(*)

SELECT COUNT(column_name)
FROM table_name
WHERE condition;

Similar codes

2 votes318 views1 answer
Oracle number to percentage
SQL
0 vote337 views1 answer
Createdb with postgresql on ubuntu
SQL
0 vote343 views1 answer
SQL query to verify the size of the table
SQL
0 vote318 views2 answers
Insert into
SQL
3 votes350 views1 answer
Oracle list privileges
SQL
1 vote399 views1 answer
Mysqld_safe Directory '/var/run/mysqld' for UNIX socket file don't exists.
SQL
-1 vote332 views4 answers
Restart mysql server ubuntu
SQL
0 vote337 views1 answer
SQL Query to delete all the tables in a database
SQL
3 votes342 views3 answers
Raw select laravel
SQL
0 vote322 views1 answer
Sql contains vs like
SQL