Support of datatypes is a major concern for a user while choosing a RDBMS. A user wants to know whether the database in consideration supports all the basic datatypes, such as NUMERIC, VARCHAR, NCHAR, NVARCHAR, and TIMESTAMP. In addition, the following questions might arise. What is the size/length of the datatypes? Does the RDBMS support BLOBs? If yes, then how well BLOBs are integrated into the SQL language? Does the database support domains, arrays, and record types?