Clause type SQL how can the others cannot?

Hi all

I met a topic called the type Clause when I was reading Pro Oracle SQL by Karen Morton, Kerry Osborne, Robyn SandsRiyaj Ntanguand Jared still. I just read the chapter and did some practice on my local machine. It is obvious that it is a very powerful feature. And I also reachered on the web and found out that it is used for spreadsheets (excel etc.). Can someone please give me a simple example which, in which case one must use the clauses types SQL Analytic Functions or group Advanced functions cannot cure?

Either said by the way, I recommend strongly Pro SQL Oracle book to all who want to learn the knowledge of SQL.

Thanks in advance

Hello

In short Yes, the TYPE clause allows you to perform calculations of "spreadsheet-like". With the help of the clause TYPE is quite rare. Now with the introduction of the WITH recursive clause in 11g 2, you can almost everything in SQL, do not even talk about the pattern match feature introduced in 12 c.

You can probably do now with analytical functions / recursive clause the clause of MODEL can do. And I must say that it is a shame that the TYPE clause has never been improved since its introduction in 10g.

In my view, the clause TYPE can come in handy when you need cross reference calculations (typically dealing with periods such as dates, years, weeks). For example, I personally used a MODEL clause for an analysis of sales time, where I watch the sales of previous years to find a pattern for the current. References of cells in a MODEL clause allows to easily, something like [my_year, my_week] model = local_pattern [(y ENTRE CV()-2 ET CV) (-1, w BETWEEN (CV-2) RESUME AND () + 2)]

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    Select acct_no,

    gl_code,

    CASE

    WHEN entry_type_label ("earned INCOME") THEN

    "Recipes".

    ON THE OTHER

    "Deferred income of credit."

    END as entry_type_label,

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    AND IN (2, 4) entry_type_no (acct_no model dimension,

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    2 OCTOBER 17 08.30.00 AM'.

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    ' NON-10011561',

    "Opening balance"

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    "Deferred income of credit."

    2,

    2 OCTOBER 17 08.30.00 AM'.

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    AMT 1788562,

    ' NON-10011561',

    "Closing balance."

    2,

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    191 =.

    (amt 1788562, "UNEARNED-10011561',"Opening balance", 2,")

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    The query above works fine. But I hardcoded the values. I want to do the same operation for the other account number which will have different non periodical. How can I reach it?

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    "Deferred income credit ' entry_type_label,.

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    ------- ---------------------------- ----------------------- ------------- --------------------- --------- ---------- ---------------
    1001 U-11561 deferred revenue credit 2 2 October 17 08.30.00 AM 100 0 opening account
    1001 U-11561 deferred revenue credit 2 Bill October 2, 17 08.30.00 AM 100 44
    E-11561 1001 recipes 4 08.30.00 2 October 17: 100 13.87 paid invoice

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