Drop All The Tables From SQL Server Database Without Using Enterprise Manager

DECLARE @SQL NVARCHAR(MAX)=''

SELECT @SQL += 'DROP TABLE ' + QUOTENAME(TABLE_SCHEMA) + '.'+ QUOTENAME(TABLE_NAME) + CHAR(13)
FROM   INFORMATION_SCHEMA.TABLES
WHERE  TABLE_TYPE = 'BASE TABLE'
  ORDER BY TABLE_NAME
SELECT @SQL

OR

SELECT 'DROP TABLE [' + SCHEMA_NAME(SCHEMA_ID) + '].[' + NAME + ']' FROM SYS.TABLES ORDER BY NAME