Essayez ce qui suit,
DECLARE @ColName varchar(126) = 'col_name'
DECLARE @ColVal varchar(64) = 'col_val'
DECLARE @SQL AS nvarchar(MAX)
SET @SQL = ''
SELECT @SQL = @SQL + 'SELECT * FROM ' + IST.TABLE_SCHEMA + '.' + IST.TABLE_NAME
+' where '+ @ColName +' = '''+ @ColVal +''' ' + CHAR(13)
FROM
INFORMATION_SCHEMA.TABLES IST
INNER JOIN INFORMATION_SCHEMA.COLUMNS ISC ON IST.TABLE_NAME = ISC.TABLE_NAME
WHERE
ISC.COLUMN_NAME = @ColName
EXEC (@SQL)