• 2022-06-04
    设有如下关系表R,S和T:R (BH,XM, XB,DWH )S(DWH,DWM)T (BH, XM, XB,DWH)实现[tex=5.929x1.357]mCWJA5fYku5WT0gMA69KJceBfbE5cDQLd+ljcGJPryCwh46BBIxVqPEV1GC7/Fkq[/tex]的SQL语句是[u]      [/u]