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[主观题]
SQL的查询语句中, ______短语用于实现关系的投影操作。A.WHEREB.SELECTC.FROMD.GROUPBY
SQL的查询语句中, ______短语用于实现关系的投影操作。
A.WHERE
B.SELECT
C.FROM
D.GROUPBY
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SQL的查询语句中, ______短语用于实现关系的投影操作。
A.WHERE
B.SELECT
C.FROM
D.GROUPBY
A.SELECT
B.FROM
C.WHERE
D.SET
A.SELECT
B.FROM
C.WHERE
D.ORDER BY
A.SELECT
B.FROM
C.WHERE
D.GROUP BY
A.REVOKE
B.INSERT
C.CREATE
D.GRANT
A.CREAT
B.GRANT
C.INSERT
D.REVOKE
A.SELECT
B.FROM
C.WHERE
D.GROUPBY