SQL470 Database Size Retrieval

sql-queries-12/database-size/mssql.sql

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+EXEC sp_spaceused;
+
+SELECT DB_NAME(database_id) AS [Database], CAST(SUM(size) * 8 / 1024 AS VARCHAR(20)) + ' MB' AS [Size] 
+  FROM sys.master_files 
+  WHERE DB_NAME(database_id) = 'university' 
+  GROUP BY database_id;
+
+SELECT d.name AS [Database], CAST(SUM(mf.size) * 8 / 1024 AS VARCHAR(20)) + ' MB' AS [Size] 
+  FROM sys.databases d 
+  JOIN sys.master_files mf 
+  ON d.database_id = mf.database_id 
+  GROUP BY d.name 
+  ORDER BY SUM(mf.size) DESC;

sql-queries-12/database-size/mysql.sql

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+SELECT table_schema AS "Database", FLOOR(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" 
+  FROM information_schema.tables 
+  WHERE table_schema = 'university' 
+  GROUP BY table_schema;
+
+SELECT table_schema AS "Database", FLOOR(SUM(data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)" 
+  FROM information_schema.tables 
+  GROUP BY table_schema 
+  ORDER BY SUM(data_length + index_length) DESC;

sql-queries-12/database-size/postgresql.sql

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+SELECT pg_database.datname AS "Database", size_pretty(pg_database_size(pg_database.datname)) AS "Size" 
+  FROM pg_database 
+  WHERE datname = 'university';
+
+SELECT datname AS "Database", pg_size_pretty(pg_database_size(datname)) AS "Size" 
+  FROM pg_database 
+  ORDER BY pg_database_size(datname) DESC;