IBM DB2 Interview Questions and Answers

IBM DB2 Interview Questions and Answers CICS Interview Questions JCL Interview Questions DB2 Interview Questions COBOL Interview Questions VSAM Interview Questions IDMS Interview Questions IMS Interview Questions MVS Interview Questions 1. What are foreign... More

IBM DB2 Interview Questions and Answers CICS Interview Questions JCL Interview Questions DB2 Interview Questions COBOL Interview Questions VSAM Interview Questions IDMS Interview Questions IMS Interview Questions MVS Interview Questions 1. What are foreign keys? These are attributes of one table that have matching values in a primary key in another table, allowing for relationships between tables. 2. Describe the elements of the SELECT query syntax SELECT element FROM table WHERE conditional statement . 3. Explain the use of the WHERE clause WHERE is used with a relational statement to isolate the object element or row. 4. What techniques are used to retrieve data from more than one table in a single SQL Statements? Joins, unions and nested selects are used to retrieve data 5. What do the initials DDL and DML stand for and what is their meaning? DDL is data definition language and DML is data manipulation language DDL statements are CREATE, ALTER, TRUNCATE DML statements are SE Less