Suggestions on Learning SQL

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Kate Liamero
Veteran Member
Posts: 70
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    John,
    We use crystal XI against an oracle 10g database to publish reports to LBI Dashboards, and I am SQL impaired. I guess if I have to teach myself some basics I should be looking at an Oracle based SQL. Do you have any suggestions? Any good book Ideas? I know some of the reports can take forever to run.

    Thanks
    Kate
    John Henley
    Senior Member
    Posts: 3348
    Senior Member
      Hi Kate,
      I moved this into a separate topic.
      I honestly can't recommend a specific book; you'll probably want to go spend a couple of hours in a bookstore looking around. There are an awful lot of books out there--both good and bad. In particular, this one looks like it might fit the bill:
      http://www.amazon.com/Ora...id=1189797089&sr=1-1

      You might also want to check out Oracle's website, and some of the other 3rd-party websites, like www.orafaq.com and
      http://www.dbazine.com.
      Thanks for using the LawsonGuru.com forums!
      John
      Chris Martin
      Veteran Member
      Posts: 277
      Veteran Member
        Depending on where you are starting from, there are a couple of good sites that I would to start with:

        1) Free online book called "SQL for Web Nerds" @ http://philip.greenspun.com/sql/. It has some good intro stuff on Oracle SQL.

        2) asktom.oracle.com.
        Kate Liamero
        Veteran Member
        Posts: 70
        Veteran Member
          Thanks Chris. I'll check it out
          Kate
          Chris Martin
          Veteran Member
          Posts: 277
          Veteran Member
            I also recommend becoming intimately familiar with the Lawson table documentation (Data File Text) to ensure you are doing your joins correctly. These are available on the Lawson Support site as well as on the lawosnguru site. Also, I recommend learning how to create/read/interpret an explain plan for your queries. It's easy in TOAD (CTRL-E). In short, queries that generate "TABLE ACCESS FULL" messages, especially on your larger tables (ie GLTRANS, MMDIST, HRHISTORY, etc) will likely have performance issues.

            What tool are you using to create your sql queries?
            Phil Simon
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            Posts: 135
            Veteran Member
              I learned quite a bit of SQL but creating Access queries based on Lawson tables and then viewing the code. It's the same for VBA; you see what you're doing as you're doing it.

              Note that Access uses Jet SQL and that Oracle/SQL Server SQL do have some differences. That I had to read.
              Phil Simon http://philsimonsystems.com/ phil@philsimonsystems.com
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