Top Interview Questions on DB2

The declaration generator provides an SQL Declare Table statement and language like COBOL, C data declaration for a particular table or view. In the context of IBM Db2, DCLGEN stands for Declaration Generator. DCLGEN is a utility that generates host language declarations for SQL statements embedded in application programs. These declarations are used to define … Read more

TIMESTAMP data type takes 10 bytes and default is YYYY-MM-DD: HH: MM:SS-NNNNNN. In IBM Db2, the physical storage length of the TIMESTAMP data type is 10 bytes. TIMESTAMP data type represents a date and time value, and its storage includes both the date and time components. The format is YYYY-MM-DD-HH.MM.SS, and the storage is allocated … Read more

The physical storage length of TIME data type is 4 bytes. In IBM Db2, the DATE data type is stored as a fixed-length field of 4 bytes. Each DATE value represents a calendar date and is stored in the format YYYY-MM-DD. The fixed-length storage ensures consistency in the storage size for all DATE values.

The physical storage length of TIME data type is 3 bytes. In IBM Db2, the physical storage length of the TIME data type is 3 bytes. The TIME data type is used to represent a time of day without a date component. The format is HH:MM:SS, where HH represents hours in 24-hour format, MM represents … Read more

Predicates are used to enhance the performance of query. In the context of databases, including DB2, a predicate is a condition or a set of conditions that are used to filter or qualify the rows retrieved from a database table. Predicates are commonly used in SQL queries to specify the criteria for selecting data. For … Read more