how to count number of columns in a table in sql server
-- Oracle
SELECT count(*) FROM ALL_TAB_COLUMNS WHERE OWNER='owner_name'
AND TABLE_NAME = 'table_name';
-- SQL Server / MySQL
SELECT count(*) FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'schema_name'
AND TABLE_NAME = 'table_name';get number of columns sql
SELECT TABLE_NAME , count(COLUMN_NAME)
FROM information_schema.columns
GROUP BY TABLE_NAME;
-- Oracle (depending on schema grants):
SELECT count(*) FROM USER_TAB_COLS WHERE TABLE_NAME = 'my_table';
SELECT count(*) FROM ALL_TAB_COLS WHERE TABLE_NAME = 'my_table';
SELECT count(*) FROM DBA_TAB_COLS WHERE TABLE_NAME = 'my_table';Copyright © 2021 Codeinu
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