Which of the following is a correlated subquery?
Answer: B
Correlated subquery references a column in the outer query and executes the subquery once for every row in the outer query while Uncorrelated subquery executes the subquery first and passes the value to the outer query.
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A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.
Answer: A
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Which of the following statements is true concerning subqueries?
Answer: A
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Which of the following is one of the basic approaches for joining tables?
Answer: D
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Which of the following is true concerning a procedure?
Answer: C
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The most frequently used relational operation, which brings together data from two or more related tables into one resultant table, is called an equi-join.
Answer: B
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How many tables may be included with a join?
Answer: D
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The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T WHERE CUSTOMER_T. CUSTOMER_ID = ORDER_T. CUSTOMER_ID
Answer: A
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What type of join is needed when you wish to return rows that do have matching values?
Answer: D
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