单项选择题

When embedding SQL in a C language program, the prefix that should be added to all SQL statements in order to distinguish SQL statements from the host language statements is( )。

A．:
B．DECLARE
C．EXEC SQL
D．SQL
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单项选择题
What Normal Form is the student table shown ( ) student table (s _ id, s _ name, s _ sex, s _ old, depart _ id, depart _ name) s _ id→s _ name, s _ sex, s _ old, depart _ id depart _ id→depart _ name
A．1NF
B．2NF
C．3NF
D．BCNF
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