How do I update a value in one cell of a column based on a test of two different table's columns? (SQL...












0














I have two tables, TableA and TableB.





  • TableA has a column named pointId


  • TableB has a column named alarmId


I need to query the first table's column pointID and check to see if it equals the second table's column name alarmID.



(This is the basic idea of what I'm trying to do... I haven't found the proper syntax for it though, so this is not working code)



UPDATE TableA 
SET TableA.pointID = 'new value'
WHERE TableA.pointID = TableB.alarmId


So, basically, I want to set a new value for pointId where I find that pointID and alarmID are equal to each other.



Any help is appreciated!










share|improve this question





























    0














    I have two tables, TableA and TableB.





    • TableA has a column named pointId


    • TableB has a column named alarmId


    I need to query the first table's column pointID and check to see if it equals the second table's column name alarmID.



    (This is the basic idea of what I'm trying to do... I haven't found the proper syntax for it though, so this is not working code)



    UPDATE TableA 
    SET TableA.pointID = 'new value'
    WHERE TableA.pointID = TableB.alarmId


    So, basically, I want to set a new value for pointId where I find that pointID and alarmID are equal to each other.



    Any help is appreciated!










    share|improve this question



























      0












      0








      0







      I have two tables, TableA and TableB.





      • TableA has a column named pointId


      • TableB has a column named alarmId


      I need to query the first table's column pointID and check to see if it equals the second table's column name alarmID.



      (This is the basic idea of what I'm trying to do... I haven't found the proper syntax for it though, so this is not working code)



      UPDATE TableA 
      SET TableA.pointID = 'new value'
      WHERE TableA.pointID = TableB.alarmId


      So, basically, I want to set a new value for pointId where I find that pointID and alarmID are equal to each other.



      Any help is appreciated!










      share|improve this question















      I have two tables, TableA and TableB.





      • TableA has a column named pointId


      • TableB has a column named alarmId


      I need to query the first table's column pointID and check to see if it equals the second table's column name alarmID.



      (This is the basic idea of what I'm trying to do... I haven't found the proper syntax for it though, so this is not working code)



      UPDATE TableA 
      SET TableA.pointID = 'new value'
      WHERE TableA.pointID = TableB.alarmId


      So, basically, I want to set a new value for pointId where I find that pointID and alarmID are equal to each other.



      Any help is appreciated!







      sql-server windows csv






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 20 at 5:50









      marc_s

      570k12811021250




      570k12811021250










      asked Nov 20 at 0:08









      JustinTime

      31




      31
























          1 Answer
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          UPDATE TableA SET TableA.pointID = 'new value'  from TableA Join TableB ON TableA.pointID = TableB.alarmId
          WHERE....


          You will need other filter conditions (in where condition) because the code above will set all the values of pointID to 'new value' wherever TableA.pointID = TableB.alarmId



          Hope it solves the issue.






          share|improve this answer





















          • That’s it! Thank you for your help!
            – JustinTime
            Nov 22 at 4:36











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          1 Answer
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          1 Answer
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          active

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          UPDATE TableA SET TableA.pointID = 'new value'  from TableA Join TableB ON TableA.pointID = TableB.alarmId
          WHERE....


          You will need other filter conditions (in where condition) because the code above will set all the values of pointID to 'new value' wherever TableA.pointID = TableB.alarmId



          Hope it solves the issue.






          share|improve this answer





















          • That’s it! Thank you for your help!
            – JustinTime
            Nov 22 at 4:36
















          1














          UPDATE TableA SET TableA.pointID = 'new value'  from TableA Join TableB ON TableA.pointID = TableB.alarmId
          WHERE....


          You will need other filter conditions (in where condition) because the code above will set all the values of pointID to 'new value' wherever TableA.pointID = TableB.alarmId



          Hope it solves the issue.






          share|improve this answer





















          • That’s it! Thank you for your help!
            – JustinTime
            Nov 22 at 4:36














          1












          1








          1






          UPDATE TableA SET TableA.pointID = 'new value'  from TableA Join TableB ON TableA.pointID = TableB.alarmId
          WHERE....


          You will need other filter conditions (in where condition) because the code above will set all the values of pointID to 'new value' wherever TableA.pointID = TableB.alarmId



          Hope it solves the issue.






          share|improve this answer












          UPDATE TableA SET TableA.pointID = 'new value'  from TableA Join TableB ON TableA.pointID = TableB.alarmId
          WHERE....


          You will need other filter conditions (in where condition) because the code above will set all the values of pointID to 'new value' wherever TableA.pointID = TableB.alarmId



          Hope it solves the issue.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 20 at 0:18









          Namandeep_Kaur

          11017




          11017












          • That’s it! Thank you for your help!
            – JustinTime
            Nov 22 at 4:36


















          • That’s it! Thank you for your help!
            – JustinTime
            Nov 22 at 4:36
















          That’s it! Thank you for your help!
          – JustinTime
          Nov 22 at 4:36




          That’s it! Thank you for your help!
          – JustinTime
          Nov 22 at 4:36


















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