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• Join the table orders from clause

  Hi all
  
  Who is the effective way to join the tables in from clause. I have two tables first with 20 lakh records and second containing 10 lakh recods.
  

   
  QUERY 1:  SELECT T4.ID,T4.ISO_NAME  FROM T,T4 
  WHERE T4.ISO_NAME LIKE '%US%' AND T.ID=T4.ID;
  
  QUERY 2:  SELECT T4.ID,T4.ISO_NAME  FROM T4,T 
  WHERE T4.ID=T.ID AND  T4.ISO_NAME LIKE '%US%';
  
  T(ID IS PRIMARY KEY) 
  (20 lakh records)
  
  T4 (ID IS PRIMARY KEY ) 
  (10 lakh records)
  ---------------------
  ID     ISO_NAME
  100  US,UK,IN,BR
  101  UK,US,BR,IN
  102  BR,UK,US,IN
  
  
  Note: No index on ISO_NAME .

  Who is the effective query 1 or 2. Please suggest me if you have an idea to rewrite the query.
  
  
  
  Kind regards
  Rajasekhar
  
  Published by: SuNRiZz68 on January 29, 2009 04:22

  In practical terms, Alex is right. Sometimes it matter what table is selected first, but does the CBO generally a very good job of deciding what you need to select the first (assuming that your statistics are up to date) but this is the situation you are trying to avoid as much as possible.

  If you specify a table main command tables in the clause is not reliable and should be used - but think before using advice and don't do that when necessary.

  Which table to select depends firstly on the join method in the execution plan. Nested loops joins perform better by selecting in the smaller table first, make a loop on the largest table. Joins the smaller set hash table in memory first, and then go through the larger table, perform searches in memory. He can't make any difference, what table is read using first the merger joins and sort.

  Back to your original question. Using the cost-based optimizer, both queries will probably roll the same because newer versions of Oracle (9i, 10g) often transform queries for efficiency before the execution anyway. According to what do you or do not request should probably run a nested loop or hash join. With a small set of data creaing index and using a search of nested loops will probably be faster to avoid full table scans. the '%' in the LIKE clause leader would ignore an index on the ISO_NAME column in any case if a main column may be used in a composite index. All this is based on the approximation using the information provided; Tuning questions should always be tested to unexpected developments.

• Satellite P100: XP Pro Media Center - unable to join the domain

  Recently bought a P100 with XP Pro OS but I'm not to be able to join the field to work correctly. Normally, to create a new account on the SBS 2003 server, then from the PC "join the domain.

  Clues?
  Peter

  Hello

  You should better check the Small Business Server site. You will find FAQS:
  http://www.smallbizserver.NET/

  Also check this:
  http://www.experts-exchange.com/Operating_Systems/SBS_Small_Business_Server/Hot_Solutions_1.html

• The PC shows it belongs to a homegroup, but when I try and join the laptop to the Homegroup PC, following the instructions, including the seizure of the password, it fails.

  I have two computers in a small home network, both running Windows 7. A laptop and the other a PC. The two appear in the network on each computer. The PC shows it belongs to a homegroup, but when I try and join the laptop to the Homegroup PC, following the instructions, including the seizure of the password, it fails. I want to share photos, files and documents, etc.

  Any ideas.

  Original title: homegroups

  Read this discussion and see if it helps you:
  http://answers.Microsoft.com/en-us/Windows/Forum/Windows_7-networking/HomeGroup-cannot-figure-out-how-to-share-files/f2ee4a6b-1540-4894-8a80-15168e55fc83>

  Here is another method that doesn't use homegroup. I've used this between two machines of Win7 and between Win7 and Win8 machine, as well as the topic Win7 and WinXP. I am frustrated with Group residential everything and currently have disabled entirely.
  http://www.howtogeek.com/HOWTO/Windows-7/share-files-and-printers-between-Windows-7-and-XP/>

  SC Tom

• Join the results of a case statement

  Hello everyone;

  I can't with a query where I use a case statement to create a new column and attempt to reach an additional table on the resulting column.  I am fairly new to this and learn by trial and error, so if you think that it looks a little ugly or ineffective, I won't be offended.  It is used on my interface based on the web of companies, while I am not able to answer some basic questions such as the version of db.

  My need to use the case statement is the result of some strange methods and somewhat contradictory in order to link the product subcodes (sku, fcsku, fnsku), to a product code parent (ProdID).  In this case, the inventory is stored in the first table with one of the few types of premises SKUs, however the dimensional data only links to the ProdID.  I'm trying to instruction box allows to send the parent a second table (ProdID) code if the sku is there, or a third table if it is found on this table.  The main reason (in this case) I have to this ProdID is I can join the dimensional data of a fourth table.

  My current query:

  SELECT / * + USE_HASH (dbin, sku, xProdID, msr) * /.

  dbin.snapshot_date, dbin.bin_id, dbin. ISBN,

  CASE WHEN sku. ProdID IS NULL THEN xProdID.ITEM_AUTHORITY_ID

  Of ANOTHER sku. ProdID

  END ProdIDMaster,

  dbin. OWNER, dbin. QUANTITY, dbin. CONTAINER_ID,

  MSR. HEIGHT, msr. WIDTH, msr. LENGTH, msr. WEIGHT, msr. DIMENSIONAL_UOM, msr. WEIGHT_UOM,

  MSR. HEIGHT * msr. WIDTH * msr. LENGTH as a Volume

  OF D_BIN_ITEMS dbin

  SKU of LEFT JOIN O_FCSKUS ON dbin. ISBN = sku. FCSKU

  LEFT JOIN (SELECT * FROM D_FNSKU_ProdID_MAP)

  WHERE REGION_ID = 1

  AND SNAPSHOT_DAY = TO_DATE('{RUN_DATE_YYYY/MM/DD}','YYYY/MM/DD')) xProdID

  ON dbin. ISBN = xProdID.FULFILLMENT_NETWORK_SKU

  LEFT JOIN (SELECT * FROM D_MP_ProdID_PKG_MEASUREMENTS)

  WHERE REGION_ID = 1 AND MARKETPLACE_ID = 1 AND PACKAGE_TYPE_ID = 1) msr

  ON ProdIDMaster = msr. ProdID

  WHERE dbin. WAREHOUSE_ID = "PHL5."

  AND dbin. Snapshot_date = TO_DATE('{RUN_DATE_YYYY/MM/DD}','YYYY/MM/DD')

  AND dbin.bin_id like '% P-1-R '.

  ORDER BY dbin.bin_id;

  The error I receive:

  Statement 1 is invalid. ORA-00904: "ProdIDMaster": invalid identifier

  ProdIDMaster appears only in two places, an alias for the case statement, as well as a side of the join statement.  If I simply change the alias name, it has no effect, so I can only assume the question is how I refer to results of the case statement. I also tried to reach the word 'CASE', which returned "1 statement is not valid. "ORA-00904:"The MATTER": invalid identifier.

  Any help or advice would be greatly appreciated.

  Post edited by: 8ea4344e-80ea-44e7-b8ac-d482be7245a7 I made a mistake when I posted the code.  The ProdID_ID shown in the join should have been ProdIDMaster.  I need to change this due to the fact that the name of the column used (which is what I based my alias on) may have been considered confidential information. All the other columns names remained unchanged.

  Hello

  8ea4344e-80EA-44e7-B8AC-d482be7245a7 wrote:

  Hello everyone;

  I can't with a query where I use a case statement to create a new column and attempt to reach an additional table on the resulting column.  I am fairly new to this and learn by trial and error, so if you think that it looks a little ugly or ineffective, I won't be offended.  It is used on my interface based on the web of companies, while I am not able to answer some basic questions such as the version of db.

  My need to use the case statement is the result of some strange methods and somewhat contradictory in order to link the product subcodes (sku, fcsku, fnsku), to a product code parent (ProdID).  In this case, the inventory is stored in the first table with one of the few types of premises SKUs, however the dimensional data only links to the ProdID.  I'm trying to instruction box allows to send the parent a second table (ProdID) code if the sku is there, or a third table if it is found on this table.  The main reason (in this case) I have to this ProdID is I can join the dimensional data of a fourth table.

  My current query:

  SELECT / * + USE_HASH (dbin, sku, xProdID, msr) * /.

  dbin.snapshot_date, dbin.bin_id, dbin. ISBN,

  CASE WHEN sku. ProdID IS NULL THEN xProdID.ITEM_AUTHORITY_ID

  Of ANOTHER sku. ProdID

  END ProdIDMaster,

  dbin. OWNER, dbin. QUANTITY, dbin. CONTAINER_ID,

  MSR. HEIGHT, msr. WIDTH, msr. LENGTH, msr. WEIGHT, msr. DIMENSIONAL_UOM, msr. WEIGHT_UOM,

  MSR. HEIGHT * msr. WIDTH * msr. LENGTH as a Volume

  OF D_BIN_ITEMS dbin

  SKU of LEFT JOIN O_FCSKUS ON dbin. ISBN = sku. FCSKU

  LEFT JOIN (SELECT * FROM D_FNSKU_ProdID_MAP)

  WHERE REGION_ID = 1

  AND SNAPSHOT_DAY = TO_DATE('{RUN_DATE_YYYY/MM/DD}','YYYY/MM/DD')) xProdID

  ON dbin. ISBN = xProdID.FULFILLMENT_NETWORK_SKU

  LEFT JOIN (SELECT * FROM D_MP_ProdID_PKG_MEASUREMENTS)

  WHERE REGION_ID = 1 AND MARKETPLACE_ID = 1 AND PACKAGE_TYPE_ID = 1) msr

  ON ProdIDid_ID = msr. ProdID

  WHERE dbin. WAREHOUSE_ID = "PHL5."

  AND dbin. Snapshot_date = TO_DATE('{RUN_DATE_YYYY/MM/DD}','YYYY/MM/DD')

  AND dbin.bin_id like '% P-1-R '.

  ORDER BY dbin.bin_id;

  The error I receive:

  Statement 1 is invalid. ORA-00904: "ProdIDMaster": invalid identifier

  ProdIDMaster appears only in two places, an alias for the case statement, as well as a side of the join statement.  If I simply change the alias name, it has no effect, so I can only assume the question is how I refer to results of the case statement. I also tried to reach the word 'CASE', which returned "1 statement is not valid. "ORA-00904:"The MATTER": invalid identifier.

  Any help or advice would be greatly appreciated.

  Whenever you have a problem, please post a small example data (CREATE TABLE and only relevant columns, INSERT statements) of all the tables involved, so that people who want to help you can recreate the problem and test their ideas.

  Also post the exact results you want from this data, as well as an explanation of how you get these results from these data, with specific examples.

  Always say what version of Oracle you are using (for example, 11.2.0.2.0).  Use "SELECT * VERSION of $ v;" to get it.

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

  When you define an alias for column (such as PriodIDMaster) in the SELECT a query clause, you can use the alias in the ORDER byclause in this request, but this is the only place in this same query, where you can use it.  If you want to use anywhere, like in a join condition, then calculate the new column in a subquery; then you can use it anywhere you want in a Super request.

  I see expression BOX (not the same as a declarationBOX) where when ProdIDMaster is defined, but I do not see where it is used.  Are you sure that you posted the code that is causing the problem?

• Change of person on behalf of the small team?

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  I hope above answers explain your request.

• If I were a bank how do I join the community to pay apple?

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  Hello

  As a first step, it may be best to contact the merchant support Apple pay and explain the nature of your request:

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