السلام عليكم ورحمة الله وبركاته ،
ارجو الاجابة يا جماعة ....
1-
Which three statements about subqueries are true? (Choose three.)
A. A main query can have more than one subquery.
B. A subquery can have more than one main query.
C. The subquery and main query must retrieve data from the same table.
D. The subquery and main query can retrieve data from different tables.
E. Only one column or expression can be compared between the subquery and main query.
F. Multiple columns or expression can be compared between the subquery and main query.


2-
Which two are true about aggregate functions? (Choose two.)
A. You can use aggregate functions in any clause of a SELECT statement.
B. You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a
SELECT statement.
C. You can mix single row columns with aggregate functions in the column list of a SELECT statement by
grouping on the single row columns.
D. You can pass column names, expressions, constants, or functions as parameter to an aggregate function.
E. You can use aggregate functions on a table, only by grouping the whole table as one single group.
F. You cannot group the rows of a table by more than one column while using aggregate functions.

السؤال الاول
A,D
اما الاختيار الثالث فسيكون أما ال
E
أو ال
F
السؤال الثانى:-
C,D

السلام عليكم ورحمة الله
السؤال الأول
A,D,F