Merge pull request #364 from Mateen0007/main

Most Efficient Way to Get Table Row Count in SQL

Author: xaeldung

sql-queries-11/Most_Efficient_Way_to_Get_Table_Row_Count_in_SQL/MySQL.sql

@@ -0,0 +1,9 @@
+-- Counting rows for course table
+SHOW TABLE STATUS LIKE 'course';
+
+-- Alternative appraoch using information schema 
+
+SELECT table_rows 
+  FROM information_schema.tables 
+  WHERE table_schema = 'university' 
+  AND table_name = 'course';

sql-queries-11/Most_Efficient_Way_to_Get_Table_Row_Count_in_SQL/PostgreSQL.sql

@@ -0,0 +1,10 @@
+-- Analyzing the Department table 
+
+ANALYZE public.Department;
+
+
+-- Counting rows for Department table using pg_class
+
+SELECT reltuples::BIGINT AS estimate 
+FROM pg_class 
+WHERE oid = 'public.Department'::regclass;

sql-queries-11/Most_Efficient_Way_to_Get_Table_Row_Count_in_SQL/SQL_Server.sql

@@ -0,0 +1,6 @@
+-- Dynamic Management Views 
+
+SELECT SUM(row_count) AS approx_rows 
+  FROM sys.dm_db_partition_stats 
+  WHERE object_id = OBJECT_ID('dbo.student') 
+  AND index_id IN (0, 1);

sql-queries-11/Most_Efficient_Way_to_Get_Table_Row_Count_in_SQL/Universal_COUNT(*)_appraoch.sql

@@ -0,0 +1,2 @@
+-- Enter your table in name in the query
+SELECT COUNT(*) FROM <table_name>