What is a cursor ? Why should it be used in DB2?

Correct Answer: Both these are used to combine the results of different SELECT statements UNION - Selects only distinct values UNION ALL - Selects duplicate values also Syntax: SELECT column_name(s) FROM table1 UNION / UNION ALL SELECT column_name(s) FROM table2; Notice that each SELECT statement within the UNION must have the same number of columns The columns must also have similar data types Also, the columns in each SELECT statement must be in the same order

Correct Answer: Use SELECT DISTINCT in DB2 query The DISTINCT keyword can be used to return only distinct (different) values Syntax: SELECT DISTINCT column1,column2 FROM table_name;

Correct Answer: economy moves from a trough to a peak.

Explanation:

There are basically two important phases in a business cycle that are prosperity and depression. The other phases that are expansion, peak, trough and recovery are intermediary phases.

 

Expansion is a phase in which, when the economy moves from a trough to a peak. It is a period when the level of business activity surges and gross domestic product (GDP) expands until it reaches a peak.

Correct Answer: Financial aid is available to community college students.

Correct Answer: In business, outsourcing is an agreement in which one company contracts its own internal activity to different company It involves the contracting out of a business process (eg payroll processing, claims processing) and operational, and/or non-core functions (eg manufacturing, facility management, call center support) to another party (see also business process outsourcing) A company moves some of its jobs to another country and employing workers in other countries to save on labor costs best describes the practice of outsourcing

Correct Answer: DeCLarations GENerator : used to create the host language copy books for the table definitions Also creates the DECLARE table

Correct Answer: a nonmatching index scan if ACCESSTYPE = 1

Correct Answer: 1 Based on the lock-size given while creating the table space 2 Programer can direct the DB2 what lock-size to use 3 If lock - size ANY is specified, DB2 usually chooses a lock-size of PAGE

Correct Answer: A DB2 utility used to collect statistics about the data values in tables which can be used by the optimizer to decide the access path It also collects statistics used for space management These statistics are stored in DB2 catalog tables

Correct Answer: To insert a NULL, move -1 to the null indicator To insert a valid value, move 0 to the null indicator