题目内容
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[单选题]
目前，外汇市场交易以()占主要地位。
A.外汇掉期交易
B.远期外汇交易
C.即期外汇交易
D.外汇期货交易
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在SQL语言中，能正确实现级联删除的命令是()。
A．ONDELETE CASCADES
B．ONDELETE RESTRICTED
C．ONDELETE NULLIFIES
D．ONDELETE DEFAULT
更多“目前，外汇市场交易以（)占主要地位。A．外汇掉期交易B．远期…”相关的问题
第2题
SQL语言中，能正确实现级联删除的命令是A．ON DELETE CASCADESB．ON DELETE RESTRICTEDC．ON DELETE
SQL语言中，能正确实现级联删除的命令是
A．ON DELETE CASCADES
B．ON DELETE RESTRICTED
C．ON DELETE NULLIFIES
D．ON DELETE DEFAULT
第3题
SQL语言中,能正确实现级联删除的命令是A．ON DELETE CASCADESB．ON DELETE RESTRICTEDC．ON DELETE
SQL语言中,能正确实现级联删除的命令是
A．ON DELETE CASCADES
B．ON DELETE RESTRICTED
C．ON DELETE NULLIFIES
D．ON DELETE DEFAULT
第4题
在SQL语言中，能正确实现级联删除的命令是（)。A．ON DELETE CASCADESB．ON DELETE RESTRICTEDC．ON DE
在SQL语言中，能正确实现级联删除的命令是()。
A．ON DELETE CASCADES
B．ON DELETE RESTRICTED
C．ON DELETE NULLIFIES
D．ON DELETE DEFAULT
第5题
SQL语言中，级联删除的短语是A．WHEN DELETE RESTRICTB．ON DELETE RESTRICTC．ON DELETE SET NULLD．
SQL语言中，级联删除的短语是
A．WHEN DELETE RESTRICT
B．ON DELETE RESTRICT
C．ON DELETE SET NULL
D．ON DELETE CASCADE
第6题
SQL语言中，创建、修改和删除一个表的命令分别是________。
A．CREAT、ALTER、DROP
B．DELET
C．ALTER、DROP
D．CREAT、MODIFY、DELETE
E．CREAT、ALTER、REMOVE
第7题
SQL语言中，级联删除的短语是A．WHEN DELETE RESTRICTB．ON DELETE RESTRICTC．ON DELETE SET NULLD．
SQL语言中，级联删除的短语是
A．WHEN DELETE RESTRICT
B．ON DELETE RESTRICT
C．ON DELETE SET NULL
D．ON DELETE CASCADE
第8题
SQL语言中，删除一个表的命令是A．DELETEB．DROPC．CLEARD．REMOVE
SQL语言中，删除一个表的命令是
A．DELETE
B．DROP
C．CLEAR
D．REMOVE
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