使用contains时出错

Question

SELECT [component_variable_child_id],[short_description]
FROM [DB231_buildsystem_10March_2015].[dbo].[component_variable_child_sequence] AS FT_TBL INNER JOIN
   CONTAINSTABLE([component_variable_child_sequence], [short_description], 'Carriage above') AS KEY_TBL
   ON FT_TBL.unique_key_column = KEY_TBL.[KEY];