Joe Celko challenges you with his trickiest puzzles and then helps you conquer them with a variety of solutions and explanations. The puzzles are a compilation from Joe's columns in DBMS and Database Programming...czytaj dalej
Before SQL programmers could begin working with OLTP (On-Line Transaction Processing) systems, they had to unlearn procedural, record-oriented programming before moving on to SQLs declarative, set-oriented...czytaj dalej