ocp 1Z0-047 131-276題解析
131. Which view would you use to display the column names and DEFAULT valuesfor a table?A. DBA_TABLE ...
原文：ocp 1Z0-047 61-130題解析
. Evaluate the following SQL statements that are issued in the given order:CREATE TABLE emp emp no NUMBER CONSTRAINT emp emp no pk PRIMARY KEY,ename VARCHAR ,salary NUMBER , ,mgr no NUMBER CONSTRAINT ...
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which three are true about scalar subquery expressions? A. They cannot be used in group by clauses. ...