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How to update the table with information of the update command written in table

Posted on 2014-03-05
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Last Modified: 2014-04-14
example
Table name mstupdates, which contains the fields table, field,old,new
table      field      old      new
mstchvs      aa      1      19
transbcc1       bb      32      343

table refers to table to be updated
field refers to column name
old refers to old value
new refers to new value
of the table.

How to use update command.

update table set field=nv where ov=ov
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Question by:searchsanjaysharma
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Accepted Solution

by:
John_Vidmar earned 2000 total points
ID: 39906231
Dynamic-SQL:
declare	@ls_SQL		varchar(1000)
,	@ls_table	varchar(100)
,	@ls_field	varchar(100)
,	@li_old		int
,	@li_new		int

declare lcur_whatever cursor for
	select	[table]
	,	[field]
	,	[old]
	,	[new]
	from	mstupdates

open lcur_whatever

while (1=1) begin
	fetch next from lcur_whatever into @ls_table, @ls_field, @li_old, @li_new
	if @@fetch_status <> 0 break

	SET @ls_SQL = 'update '+ @ls_table +' set '+ @ls_field +' = '+ Str(@li_new) +' where '+ @ls_field +' = '+ Str(@li_old)
	print @ls_SQL

	exec (@ls_SQL)
	if @@error <> 0 break
end

close lcur_whatever
deallocate lcur_whatever

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Author Closing Comment

by:searchsanjaysharma
ID: 39999684
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