FAQ on DB2

Check constraint is a database rule that checks data integrity. Thus, only values from the domain for the attribute or column are allowed. In DB2, a CHECK constraint is a type of constraint that is used to enforce a condition on the values that can be inserted or updated in a column of a table. … Read more

The following three are the fields from SQLCA: SQLCODE SQLERRM SQLERRD The SQLCA (SQL Communication Area) is a data structure used in DB2 to provide feedback about the execution of SQL statements. It contains various fields that hold information about the success or failure of SQL operations. Here are some common fields found in the … Read more

136 is the maximum length of the SQLCA. The SQLCA (SQL Communication Area) in IBM Db2 is a data structure used to communicate information between the application program and the Db2 database manager. In Db2, the SQLCA has a fixed length of 136 bytes. This includes fields for SQLCODE, SQLSTATE, and other related information. So, … Read more

SQLCA stands for Server Query Language Communication Area. Basically, it is a collection of variables that may be updated after the execution of every SQL statement. A program having SQL executable statement can provide maximum one SQLCA whereas in Java it is not applicable. In the context of IBM’s DB2 database system, SQLCA stands for … Read more

System Services component is responsible for handling DB2 startup and shutdown. In IBM DB2, the Database Manager (DBM) is responsible for the startup and shutdown of the DB2 instance. The DBM is a component that manages the overall operation of a DB2 database system. It is responsible for coordinating activities such as instance startup, instance … Read more