I have given three ideas to improve SQL performance in this post. Quickly you can implement in your project.
SQL DATE and Time comparison popular styles and SQL queries useful to read for your project.
Load utility in DB2, to load bulk data, very popular. The questions given in this post are useful for interviews.
Locks and Concurrency are tricky words. Understand the real purpose of these mechanisms for better use of database.
TSQ in CICS helps to write and read records internal to program. Read more.
Top five DB2 storage area questions to understand quickly
Mostly asked certification questions in DB2. You need more focus on these areas before you take the test.
You need these tips handy when embedding DB2 database in application program like COBOL or PL/I