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Editorial Team
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Asked: 2026-05-23T12:02:31+00:00

Revised Query.. the [Id] column is unique to all records.. the query should return

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Revised Query.. the [Id] column is unique to all records.. the query should return the correct value for CorEURUSD to both Symbol = EURUSD and Symbol = GBPUSD where the [Time] = [Time] values.

 CREATE TABLE [dbo].[Tck2](
[Id] [bigint] IDENTITY(1,1) NOT NULL,
[Symbol] [varchar](35) NULL,
[Time] [datetime] NULL,
[CorEURUSD] [decimal](14, 10) NULL,
[CorEURUSD2] [decimal](14, 10) NULL
  ) ON [PRIMARY]


 INSERT [VT7STAB1].[dbo].[Tck2] ([Symbol],[Time],[CorEURUSD],[CorEURUSD2]) VALUES('EUR/USD', '2011-07-01 12:04:28.000', 0.8229, 0.6488)
 INSERT [VT7STAB1].[dbo].[Tck2] ([Symbol],[Time],[CorEURUSD],[CorEURUSD2]) VALUES('EUR/USD', '2011-07-01 12:26:17.000', 0.9427, 0.6558)
 INSERT [VT7STAB1].[dbo].[Tck2] ([Symbol],[Time],[CorEURUSD],[CorEURUSD2]) VALUES('EUR/USD', '2011-07-01 12:58:34.000', 0.7713, 0.5267)
 INSERT [VT7STAB1].[dbo].[Tck2] ([Symbol],[Time],[CorEURUSD],[CorEURUSD2]) VALUES('GBP/USD', '2011-07-01 12:04:28.000', 0, 0)
 INSERT [VT7STAB1].[dbo].[Tck2] ([Symbol],[Time],[CorEURUSD],[CorEURUSD2]) VALUES('GBP/USD', '2011-07-01 12:26:17.000', 0, 0)
 INSERT [VT7STAB1].[dbo].[Tck2] ([Symbol],[Time],[CorEURUSD],[CorEURUSD2]) VALUES('GBP/USD', '2011-07-01 12:58:34.000', 0, 0)

Running the following query in an attempt to copy the CorEURUSD column from Symbol – ‘EUR/USD’ into the resulting CorEURUSD column for Symbol = ‘GBP/USD

update Tck2
set CorEURUSD = (
     select CorEURUSD
     from Tck2 T 
     where Symbol = 'EUR/USD')
 where Symbol = 'GBP/USD'

gave this error
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.

and when I used this revision..

update Tck2
set CorEURUSD = (
     select CorEURUSD
     from Tck2 T 
     where Symbol = 'EUR/USD')
 where Symbol = 'GBP/USD'
 and T.[Time] = [Time]

It throws this error.

Msg 4104, Level 16, State 1, Line 2
The multi-part identifier “T.Time” could not be bound.

I hope that is better, sorry for the ‘mass-confusion’ please revise answers to match the above query and table which should be correct.

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1 Answer

  1. Editorial Team

    Just a guess based on loose specs and no sample data / desired results.

    UPDATE t
    SET t.[CorEURUSD] = x.[CorEURUSD] 
    FROM dbo.TicksForex AS t
    INNER JOIN dbo.TicksForex AS x
    ON t.[id] = x.[id]
    WHERE 
        t.[Symbol] = 'GBP/USD'
        AND x.[Symbol] = 'EUR/USD';

    EDIT 2011-07-03
    Based on revised specs. Is [Time] really going to be your key for this type of update? Sounds risky. Anyway, since [Time] was the only way I could determine to join two rows based on your narrative and sample data, here is what I assume you mean (and I can also assume you only want to update CorEURUSD and not CorEURUSD2):

    UPDATE t
    SET t.[CorEURUSD] = x.[CorEURUSD]
    FROM dbo.Tck2 AS t
    INNER JOIN dbo.Tck2 AS x
    ON t.[Time] = x.[Time]
    WHERE t.Symbol = 'GBP/USD'
    AND x.Symbol = 'EUR/USD';

    Really wasn’t that much of a modification really, I merely changed the join condition.

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