Home
SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: ReferenceThe HCL OneDB™ Guide to SQL: Reference contains the reference information for the system catalog tables, data types, and environment variables of the HCL OneDB™ dialect of the SQL language, as implemented in HCL OneDB™. These topics also include information about the stores_demo, sales_demo, and superstore_demo databases that are included with HCL OneDB™.
Data typesEvery column in a table in a database is assigned a data type. The data type precisely defines the kinds of values that you can store in that column.
Data Type Casting and Conversion
Using User-Defined Casts
Implicit Casts

Implicit Casts

Implicit casts allow you to convert a user-defined data type to a built-in type or vice versa. The database server automatically invokes a single implicit cast when it must evaluate and compare expressions or pass arguments. Operations that require more than one implicit cast fail.

Users can explicitly invoke an implicit cast using the CAST AS keywords or the double colon ( :: ) cast operator.

Have feedback?
Google Analytics is used to store comments and ratings. To provide a comment or rating for a topic, click Accept All Cookies or Allow All in Cookie Preferences in the footer of this page.