How to get part of the column value in sybase where this column situated in a query which is inside other query?

问题

I have a column named Cons in a table named Conses as Order::Resource(PPP32#BB300320LQ00J#AAAR05504) I have second table which depends on first table. i wants to get all data from the seconds table and i did it manually as below and result is ok

select * from so_db..item   where  id =('PPP32' )
                            and    sub_id =('BB300320LQ00J')
                            and    tem_id =('AAAR05504');

but i want to replace inside the parentheses with an other query which must get one part of the column mentioned above as follow:

id = first part of column before '#' character

sun_id = middle part of column between '#' character

tem_id = last part of column

select * from so_db..item   where  id =( select Cons from er_db..Conses where UsedBy_ = 'mmmf8c713f490f8133c00e16ffdea136add')
                            and    sub_id =(select Cons from er_db..Conses where UsedBy_ = 'mmmf8c713f490f8133c00e16ffdea136add')
                            and    tem_id =(select Cons from er_db..Conses where UsedBy_ = 'mmmf8c713f490f8133c00e16ffdea136add');

Does anybody know how to do this?

回答1:

You simply have to do string manipulation.

Use substring, charindex, char_length, right and left functions :)

declare @string varchar(50)
select @string = 'Order::Resource(PPP32#BB300320LQ00J#AAAR05504)'
declare @start int, @end int, @secondstring varchar(100)

select @start = charindex('#',@string)
select @secondstring = substring(@string, @start+1, len(@string))

select @end = charindex('#',@secondstring)

select substring(@string,charindex('(', @string)+1, @start-1-charindex('(', @string)),
       substring(@string,@start+1,@end-1), 
       substring(@string, @start+@end+1, len(@string)-(@start+@end+1))

来源：https://stackoverflow.com/questions/12173470/how-to-get-part-of-the-column-value-in-sybase-where-this-column-situated-in-a-qu

标签

sql

sybase-ase