By John Connell
Beginning visible easy 6 Database Programming introduces you to databases and takes you throughout to the newest ADO applied sciences in visible simple 6. step-by-step, this booklet may help you to construct operating database elements and purposes in visible easy. no matter if you must paintings with databases in your machine, get entry to legacy info, or application database entry around the net, this is often the booklet that might get you started.
This ebook will give you all of the functional wisdom and abilities you must construct a fantastic starting place in Microsoft entry and visible easy database programming. This finished reference bargains thorough assurance of object-oriented programming, together with the right way to create info dealing with periods and ActiveX controls for code reusability; how you can successfully use DAO, ADO, ASP, and SQL; and the way to take facts mining to the following level.
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Extra info for Beginning Visual Basic 6 Database Programming
Not only that, it would be more difficult for the data entry clerk to ensure that the information was added correctly. It makes sense to avoid data duplication and find a way to store all of the information about the publisher just once, in the Publishers table (after all, we don't want to duplicate all of the information about that publisher each time we add a new book title issued by the publisher). What we could do then would be to relate that single publisher record to each of the three hundred books they publish (the information about the books resides in the Titles table).
Typically, each new record is placed at the end of the table. If we have a Titles table with over 8,500 records, we can bet the records were not entered in the database in alphabetic order. Therefore, if we wanted to select only those titles that begin with the letter L from the Titles table, the database would need to look at each and every record and gather up only those whose titles began with the letter L. This is complicated processing and can slow our application down to a crawl. Indexes Luckily, we can create an index on any field or fields in a table that we know our users will be searching on.
What are DLLs? e. dynamically. This is unlike the static linked libraries in the C language that are included in each and every program. mdb database. If the files were statically linked, the entire Jet engine suite of files would need to be incorporated into each of your four programs. Before Windows arrived on the scene that's exactly how things were done. dlls are on disk and called as necessary by whatever programs need them. Any enhancements to Jet are placed in newer • dlls and any program that uses them reaps the benefits without having to change the program itself.
Beginning Visual Basic 6 Database Programming by John Connell