How to use the clause type conditionally create new lines

This question is just for learning - no object other than to start real world to create versions of some queries known to learn how to measure the performance of the MODEL clause clause of the MODEL versions.

The question is: How can you write a STANDARD clause that pivots (updates) ONLY the lines that actually need to rotate and do NOT change the lines that have no value and cannot be rotated.

I found a good site that has about two dozen example articles on different pieces. This first link is the beginning of the series.

SQL features tutorials - Clause TYPE

http://www.sqlsnippets.com/en/topic-11663.html

This link is to a clause of FAQ of BluShadow MODEL version "how to convert rows to columns."

Line - MODEL method string

http://www.sqlsnippets.com/en/topic-11987.html

The solution to this link uses this line of source:

POSITION KEY VAL

--- ---------- ----------

R08 0 v1, v2, v3,.

and this result set:

POSITION KEY VAL

--- ---------- ----------

R08 1 v1

R08 2 v2

R08 3 v3

The reason why it produces that result set is this clause of the statement of MODEL

RETURN THE UPDATED LINES

If you comment on this article, you will see that the original lines are all in position 0. This means that the solution reproduced EACH SOURCE LINE even if there is only one item in the list of values.

Thus, even a line source with a single value (for example, the r01 'a') will be updated and updated this line is returned.

For a large number of data sources with only a few lines that actually need to rotate it would be a great performance of infringement.

This is the sample data source

with t as (button 1, 'a' value 'abc' col2, col3 'def' of the double
Select Union all 2, 'b', 'ghi', 'jkl' from dual
Union all select 3, 'c, d, e, 'mno', 'pqr' from dual.
Union all select 4, 'f', 'stu', 'vwx' from dual
)
Select the key, value, col2, col3
t

KEY, VALUE, COL2, COL3
1, a, abc, def
2, b, GHI, jkl
3, "c, d, e, mno, pqr.
4, f, stu, vwx

Lines 1, 2 and 4 only have a value of (a, b, c respectively.

Only line 3 must rotate. It contains "c, d, e" and which must become 3 lines in the result set

Value of the key, col2 col3
1 an abc def
2B ghi jkl
3 c mno, pqr
3 d mno, pqr
3 e mno, pqr
4 f stu vwx

The nut of the problem is that if the clause 'RETURN UPDATED ROWS' is used, then the lines 1, 2 and 4 must be updated in order to be returned in the result set. And if this clause is NOT used, then line 3 must be updated by 'c', d, e 'c' and two new product lines: one line for a ' and one for 'e '.

How can you do this with the TYPE clause without the help of the clause "Return LINES UPDATE"? I don't have a solution to sample showing what I tried because I can't understand what it takes to even try.

I have a solution that uses "RETURN UPDATED ROWS" but I want to compare this performance to the exercise, when this clause is NOT used.

We ask BluShadow to add the solution of MODEL clause to this FAQ with other similar solutions.

Like this?

SQL > with t as
() 2
3 select the 1 key, 'a' val, 'abc' col2, col3 'def' of the double


Select 4 Union all 2, 'b', 'ghi', 'jkl' from dual
5 union all select 3, 'c, d, e, 'mno', 'pqr' from dual.
Select 6 Union all the 4 'f', 'stu', 'vwx' from dual
7)
8. Select the key
9, key_1
10, val
11, regexp_substr (val, ' [^,] +', 1, key_1) val_new
12, col2
13, col3
14 t
model 15
16 partition by (key)
dimension (1 key_1) 17
18 measures (val, col2, col3, (length (val) - length (replace (val, ",")) + 1) as len)
19 rules
(20)
21 val [for 1 to increment of len key_1 [1] 1] = val [1]
22, col2 [for 1 to increment of len key_1 [1] 1] = col2 [1]
23, col3 [for 1 to increment of len key_1 [1] 1] = col3 [1]
24)
25 order
26 by key
27, key_1;

KEY KEY_1 VAL VAL_N NECK NECK
---------- ---------- ----- ----- --- ---
1 1 has an abc def
2 b 1 b ghi jkl
3 1 c, d, e c mno pqr
3 2 c, d, e d mno pqr
3 3 c, d, e e mno pqr
4 1 f f stu vwx

6 selected lines.

Tags: Database

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    After a lot of work, I finally could restore my OS using Windows backup disks that I created a few years back. (The OS has been corrupted when the power has been accidentally deleted from the system and the battery was dead)

    Restoring backup widows put everything on 444 GB C drive.  Nothing I put on the SSD drive d:-20 GB and there is nothing in the tools of HP E: drive - 4 GB

    How can I make use of the SSD drive to help speed up the system?  I see the system starts and runs more slowly now.  I'm ready to blow the current operating system and re-run the Windows backup utility.  But I need to know how to use the SSD during the restoration.

    Any help is appreciated.

    Thank you

    Bob

    Hey @llebrez,

    Welcome to the Forums of HP Support! This is a great place to find solutions and help our community!

    I understand that you have some information about using the SSD in your HP Pavilion dm4 Beats Edition Entertainment Notebook. I'd be happy to help you with that.

    The SSD in your laptop is used for a technology called Intel Smart Response. Intel Smart Response uses the SSD as a type of Cache smart to help load the items faster. The reason why that is not used currently is because the restoration of the system is not designed to use the SSD for intelligent caching and is not able to establish that on its own.

    If you want to configure Intelligent caching on your laptop, you can follow this guide provided by overclock.net: how: implement the Intel Smart Response Technology (SSD caching)

    I hope this helps. If you have more questions that I'm able to answer for you, please do not hesitate to ask.

    Please hold me.

    By pressing the Thumbs Up button below, you can always say thank you!

    See you soon.

  • How to determine the image type in IMAQdx

    You can use the property IMAQ node to determine the image type when creating images.  However, when I try with IMAQdx I get 0 bits per pixel and I do not see a type as for IMAQ image.  I am creating 8-bit images when my camera is color.  How can I determine the image type of the camera file?

    Hi rammer,.

    IMAQdx exposes an attribute called "TypeOfImageInUse" that will give you the image type expected for the current settings of the camera. However, none of the functions that return an image IMAQdx will automatically convert the image to the format automatically, so you don't normally have to worry about this.

    I do not believe that the attribute is now directly exposed as his own property node, but you can use the CameraAttributes-> ActiveAttribute/ValueU32 those for questioning as any other attribute of dynamic camera.

    Eric

  • Selection of the list of clients using the clause "EXISTS".

    Dear all,

    I have 3 tables, say,

    TABLE1:

     

    CUST_CODE

    (PRIMARY KEY)

    CUST_NAME

    CUST_COUNTRY_CODE

    CUST_CITY_CODE

    CUST_AREA_CODE

    A

    CUST1

    COU1

    CIT1

    A1

    B

    CUST2

    COU2

    CIT2

    A2

    C

    CUST3

    COU2

    CIT2

    A3

    D

    CUST4

    COU3

    CIT4

    A4

    E

    CUST5

    COU3

    CIT5

    A5

    TABLE2

     

    STOCK_SYS_ID

    (PRIMARY KEY)

    STOCK_CUSTOMER_CODE

    STOCK_CUSTOMER_

    COU_CODE

    STOCK_

    CUSTOMER_

    CIT_CODE

    STOCK_

    CUSTOMER_

    ARE_CODE

    STOCK_DOC_

    CREATED

    1

    A

    [Leaving empty as we have reference only to the customers and the date here...]

    10/15/2015

    2

    B

    15/09/2015

    3

    A

    16/08/2015

    4

    C

    18/08/2015

    5

    E

    22/07/2015

    6

    C

    31/01/2015

    7

    A

    15/10/2014

    TABLE 3

     

    AREA_CODE

    AREA_COUNTRY_CODE

    AREA_CITY_CODE

    A1

    COU1

    CIT1

    A2

    COU2

    CIT2

    A3

    COU3

    CIT2

    A4

    COU3

    CIT3

    A5

    COU4

    CIT5

    How can I find the list of clients of TABLE1, which are present in TABLE2 by 2015 and have country-city-zone, both correct mapping as specified in section TABLE3 using the clause "EXISTS".

    Is that my output will be like,

     

    CUST_CODE

    (ONLY CORRECT CUSTOMER CODES)

    CUST_NAME

    A

    CUST1

    B

    CUST2


    Thanks in advance,

    Séverine Suresh

    Hello

    So, you want to see 3 columns in table1 correspond to 3 columns in t3.  It is not enough for only 1 column equal:

    Area_Code must be equal

    country_code and must be equal

    city_code and must be equal.

    Here's a way to encode that, by using the EXISTS operator in a WHERE clause:

    SELECT cust_no, cust_name

    FROM table1 t1

    WHEN THERE IS)

    SELECT 0

    Table 3 T3

    WHERE t3.area_code = t1.cust_area_code

    AND t3.area_country_code = t1.cust_country_code

    AND t3.area_city_code = t1.cust_city_code

    )

    ;

    I hope that answers your question.

    If not, please post a small example of data (CREATE TABLE and only relevant columns, INSERT statements) for all of the tables involved and the results you want to start from these data (otherwise what you've posted already).

    Explain, using specific examples, how you get these results from these data.

    Always say what version of Oracle you are using (for example, 11.2.0.2.0).

    See the FAQ forum: Re: 2. How can I ask a question on the forums?

  • How to use the concepts Advanced PL/SQL in oracle reports and forms

    Hi all

    Can anyone suggest me how to use the Concepts(nested tables,PAA,Varrays,Objects...) Advanced PL/SQL in Oracle forms.

    In fact, I created a Table whose column of type Varray. now, I want to create an element in oracle forms on this field. can anyone suggest me how to proceed.

    Thank you
    Kumar

    Hello

    Take a look at this one:
    http://SheikYerbouti.developpez.com/tutoforms10g/tutoforms10g.htm
    especially the chapter on the block that contains a collection of (2.3.3). The sample is built around a nested table, but you get the idea to adapt to work with a varray.

    Kind regards
    Alex

    If someone useful or appropriate please mark accordingly.

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