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多选题
Which four are correct guidelines for naming database tables?（）
A
Must begin with either a number or a letter.
B
Must be 1-30 characters long.
C
Should not be an Oracle Server reserved word.
D
Must contain only A-Z, a-z, 0-+, _, *, and #.
E
Must contain only A-Z, a-z, 0-9, _, $, and #.
F
Must begin with a letter.
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