Advanced Sql MCQs with Explanations

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.

Outer join is the correct answer to “What type of join is needed when you wish to include rows that do not have matching values”. This question is standard in competitive examination syllabi for Advanced Sql.

All of the above is the correct answer to “What type of join is needed when you wish to return rows that do have matching values”. This question is standard in competitive examination syllabi for Advanced Sql.

They include procedural and SQL statements. is the correct answer to “Which of the following is true concerning a procedure”. This question is standard in competitive examination syllabi for Advanced Sql.

A way to establish an IF-THEN-ELSE in SQL. is the correct answer to “A CASE SQL statement is which of the following”. This question is standard in competitive examination syllabi for Advanced Sql.

Both consist of procedural code. is the correct answer to “Which of the following statements is true concerning routines and triggers”. This question is standard in competitive examination syllabi for Advanced Sql.

All of the above is the correct answer to “Which of the following is one of the basic approaches for joining tables”. This question is standard in competitive examination syllabi for Advanced Sql.

All of the above. is the correct answer to “Which of the following is true concerning systems information in an RDBMS”. This question is standard in competitive examination syllabi for Advanced Sql.

Equi-join is the correct answer to “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”. This question is standard in competitive examination syllabi for Advanced Sql.

Hard-coded SQL statements in a program language such as Java. is the correct answer to “Embedded SQL is which of the following”. This question is standard in competitive examination syllabi for Advanced Sql.

Combines the output from multiple queries and must include the same number of columns. is the correct answer to “A UNION query is which of the following”. This question is standard in competitive examination syllabi for Advanced Sql.

Involves the use of an inner and outer query. is the correct answer to “Which of the following statements is true concerning subqueries”. This question is standard in competitive examination syllabi for Advanced Sql.

All of the above. is the correct answer to “How many tables may be included with a join”. This question is standard in competitive examination syllabi for Advanced Sql.

Cartesian join is the correct answer to “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 ;”. This question is standard in competitive examination syllabi for Advanced Sql.

They have an event, condition, and action. is the correct answer to “Which of the following is true concerning triggers”. This question is standard in competitive examination syllabi for Advanced Sql.

False is the correct answer to “Triggers are stored blocks of code that have to be called in order to operate.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “The joining technique is useful when data from several relations are to be retrieved and displayed and the relationships are not necessarily nested.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “There should be one condition within the WHERE clause for each pair of tables being joined.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “Subqueries can be nested multiple times.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “The code to create triggers and routines is stored in only one location and is administered centrally.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “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.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “The UNION clause is used to combine the output from multiple queries together into a single result table.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “ROLLBACK WORK asks SQL to empty the log file.”. This question is standard in competitive examination syllabi for Advanced Sql.

False is the correct answer to “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.”. This question is standard in competitive examination syllabi for Advanced Sql.

False is the correct answer to “Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.”. This question is standard in competitive examination syllabi for Advanced Sql.

False is the correct answer to “A correlated subquery is where the outer query depends on data from the inner query.”. This question is standard in competitive examination syllabi for Advanced Sql.

False is the correct answer to “A function returns one value and has only output parameters.”. This question is standard in competitive examination syllabi for Advanced Sql.

True is the correct answer to “With the UNION clause, each query involved must output the same number of columns, and they must be UNION compatible.”. This question is standard in competitive examination syllabi for Advanced Sql.