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  • Oracle Auto increment trigger HOWTO

    calendar Dec 13, 2016 · 1 min read
     en featured knowledgebase sql  · oracle tip
     ·
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    Oracle Auto increment trigger HOWTO

    Oracle SQL Developer is full of nice feature, damned by a overwhelming options pane, like the one I will describe to you right now.

    Even if  Oracle databases (<12) does not support auto increment, you can easily ask to your sql data modeler to generate for you a sequence and a trigger in a automatic way.


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  • Oracle Database Sync

    calendar Nov 22, 2016 · 1 min read
     en featured knowledgebase sql  · oracle tip
     ·
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    Oracle Database Sync

    Oracle SQL Developer is full of nice feature, damned by a overwhelming options pane, like the one I will describe to you right now.


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  • ORA-01461: can bind a LONG value only for insert into a LONG column

    calendar Sep 1, 2015 · 1 min read
     en knowledgebase  · bad oracle relax sql
     ·
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    ORA-01461: can bind a LONG value only for insert into a LONG column

    Disapprove with me! Disapprove with me!

    Okey, you know Oracle. A very good database, a very old database, a very solid rock. Not famous for its error messages. I have already stumbled upon a misleading error on the old rock.


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  • Debian perfect work environment

    calendar Sep 28, 2014 · 3 min read
     en featured software unix-featured  · ibm linux oracle unix virtualization
     ·
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    Debian perfect work environment

    Working in a big company, my work laptop came with MS-Windows7 Enterprise installed. But as you imagine, Unix is my preferred desktop environment. So let’s how to configure a perfect Debian Linux for a old wolf consultant like me. You will be able to install commercial software mubmo jumbo like Oracle Express and IBM Websphere in a snap, and have a 64 rock solid system, easy to bring in a USB stick if you like.


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  • Oracle Invalid number ORA-01722

    calendar Jul 15, 2013 · 1 min read
     en knowledgebase sql  · bad bug oracle sql
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    Oracle Invalid number ORA-01722

    I stumbled upon a very brain-f**k error on Oracle 10g on these days.

    Context: the following query [sql]SELECT * FROM (
    SELECT TO_NUMBER(CUSTOMER_ID) AS SNDG FROM BAD_CODES_TABLE WHERE
    AND I_LIKE=UPPER(‘STATIC_CONDITION’) AND CUSTOMER_ID NOT LIKE ‘%P%’ ) S WHERE TO_NUMBER(S.SNDG) >2000[/sql] could trigger a Invalid number if CUSTOMER_ID column contains invalid numbers.

    Why?

    Well…if you ask to “explain plan”, you will get something like

    • a table full scan
      • Filter Predicates AND
        • I_LIKE=UPPER('STATIC_CONDITION')
        • TO_NUMBER(S.SNDG) >2000
        • CUSTOMER_ID NOT LIKE '%P%'

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    Giovanni Giorgi

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