Sql count * vs count 1

COUNT(*) gives the total number of records in the table including null values.

COUNT(1) gives the total number of records in the table including null values.

COUNT(column_name) only considers rows where the column contains a non-NULL value.

Source: techybilli.com

Similar codes

0 vote211 views2 answers
Illuminate\Database\QueryExceptionSQLSTATE[HY000] [2002] No such file or directory
SQL
0 vote156 views1 answer
Drop view sql
SQL
0 vote101 views1 answer
Work around for mutating problem in Oracle Triggers. Please check it out.
SQL
0 vote98 views1 answer
Mysql undo delete
SQL
2 votes111 views4 answers
List databases in sql server
SQL
0 vote56 views1 answer
Update sql join multiple tables
SQL
0 vote104 views2 answers
What is 1=2 in sql
SQL
0 vote118 views1 answer
Oracle last connexion
SQL
25 votes100 views3 answers
How to use a database to see tables mysql
SQL
1 vote142 views1 answer
Postgresql blocked on mac
SQL