Referential integrity (RI) is the state in which all values of all foreign keys are valid. Both traditional RI and temporal RI are relationships between pairs of tables, in which the business rules are represented. In Db2 V8, informational RI (with NOT ENFORCED keyword) was added to benefit certain
Db2 12 SQL Pagination: The ability to "page" through a result set and see the next "page" of results. Db2 12 introduced support for data-dependent and numeric-based pagination.
There are tremendously powerful programming possibilities with SQL and many of these features are translatable across RDBMS’s with only a modest amount of effort. Utilizing these advanced SQL features can drastically reduce development time and improve performance, and so let's explore them!
When it comes to tuning a query, program, or even an application that most developers are not sure where to begin or what may be causing response time issue(s). This article is here to help!
Today we will introduce the XQuery language and cover a basic subset of this language, including constructor and FLWOR expressions. Both expressions will be useful in SQL/XML functions in DB2 for z/OS.