Cursors for SQl server

• bpsavi123

  SSC-Addicted

  Points: 499

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  May 15, 2015 at 10:11 am

  #298158

  Hi,

  i have task where i need to update the 2 columns from 2 different tables.I need to get one column from one table and update to the other table.If the column name do not match....Please help

• Sean Lange

  SSC Guru

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  May 15, 2015 at 10:29 am

  #1798268

  bpsavi123 (5/15/2015)

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  Hi,

  i have task where i need to update the 2 columns from 2 different tables.I need to get one column from one table and update to the other table.If the column name do not match....Please help

  Hi and welcome to SSC. We can help but we need some information. And for the record we will want to avoid cursors in nearly every situation as they are horrible for performance.

  To help you with your current problem please take a look at the first link in my signature for best practices when posting questions.

  _______________________________________________________________

  Need help? Help us help you.

  Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

  Need to split a string? Try Jeff Modens splitter http://www.sqlservercentral.com/articles/Tally+Table/72993/.

  Cross Tabs and Pivots, Part 1 – Converting Rows to Columns - http://www.sqlservercentral.com/articles/T-SQL/63681/
  Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs - http://www.sqlservercentral.com/articles/Crosstab/65048/
  Understanding and Using APPLY (Part 1) - http://www.sqlservercentral.com/articles/APPLY/69953/
  Understanding and Using APPLY (Part 2) - http://www.sqlservercentral.com/articles/APPLY/69954/

• Lynn Pettis

  SSC Guru

  Points: 442467

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  May 15, 2015 at 10:34 am

  #1798269

  bpsavi123 (5/15/2015)

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  Hi,

  i have task where i need to update the 2 columns from 2 different tables.I need to get one column from one table and update to the other table.If the column name do not match....Please help

  I have to agree with Sean. Really can't help you with what little info you provided. Also, cursors have their uses but in this case it may not be the correct option.

• Alan Burstein

  SSC Guru

  Points: 61136

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  May 15, 2015 at 4:42 pm

  #1798374

  As others said, more details: good, cursor for this: bad.

  It sounds like you can accomplish what you are trying to do with two update statements.

  "I cant stress enough the importance of switching from a sequential files mindset to set-based thinking. After you make the switch, you can spend your time tuning and optimizing your queries instead of maintaining lengthy, poor-performing code."

  -- Itzik Ben-Gan 2001

• Jeff Moden

  SSC Guru

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  May 15, 2015 at 6:06 pm

  #1798384

  bpsavi123 (5/15/2015)

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  Hi,

  i have task where i need to update the 2 columns from 2 different tables.I need to get one column from one table and update to the other table.If the column name do not match....Please help

  Update using a WHERE NOT EXISTS using a correlated sub-query of the two tables.

  --Jeff Moden

  ---

  RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
  First step towards the paradigm shift of writing Set Based code:
  ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

  Change is inevitable... Change for the better is not.
  

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  Helpful Links:
  How to post code problems
  How to Post Performance Problems
  Create a Tally Function (fnTally)