difference, projection, join
selection, projection, join
selection, intersection, join
intersection, projection, join
difference, projection, product
第1题：
An(73)statement can perform. a calculation and store the result in a variable so that it can be used later。
A．assignment
B．executable
C．input
D．output
第2题：
A. in the INTO clause of an INSERT statement
B. in the FROM clause of a SELECT statement
C. in the GROUP BY clause of a SELECT statement
D. in the WHERE clause of a SELECT statement
E. in the SET clause of an UPDATE statement
F. in the VALUES clause of an INSERT statement
第3题：
● （73） statement can perform. a calculation and store the result in a variable so that it can be used later.
（73）
A. Assignment
B. Control
C. I/O
D. Declaration
第4题：
An ______ statement can perform. a calculation and store the result in a variable so that it can be used later.
A．executable
B．input
C．output
D．assignment
第5题：
______statement can perform. a calculation and store the result in a variable So that it can be used later．
A．Assignment
B．Control
C．I/O
D．Declaration
A．
B．
C．
D．
第6题：
A SELECT statement can be used to perform these three functions:1. Choose rows from a table.2. Choose columns from a table3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? （）
A. difference, projection, join
B. selection, projection, join
C. selection, intersection, join
D. intersection, projection, join
E. difference, projection, product
第7题：
A. NLS_LANG
B. NLS_COMP
C. NLS_SORT
D. None of the above
第8题：
An （70） statement can perform. a calculation and store the result in a variable sothat it can be used later.
（70）
A. executable
B. input
C. output
D. assignment
第9题：
l An (5) statement can perform. a calculation and store the result in a variable so that it can be used later.
A. executableB.inputC.outputD. assignment
第10题：
In which four clauses can a subquery be used?（）