Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Sub query substring concatenation issue

Sub query substring concatenation issue

Sub query substring concatenation issue

Hi I’ve been stumped on how to use the substring
In my subqry but i am a little stumped
Could someone lend a hand and explain the
Err in my ways please..

select tagname, padname = 1, datetime, (select value from analoghistory where tagname = 'tata' + substring(a.tagname, 6, 2) + 'lastpart'
and datetime = a.datetime) as value
from DiscreteHistory a
where tagname in ('Tag name here')
and datetime >= {ts '2017-11-01 07:45:00'}
and datetime <= {ts '2017-11-10 15:48:00'}
and wwresolution = 60000
and value = 1
order by tagname, datetime


RE: Sub query substring concatenation issue

what error does the above give you?
Or does not give any error but does not do what you expect? and on this case what were you expecting to happen?

And do not use SQL server reserved words for column names - it is quite bad practice and columns like "datetime" do not express the meaning of the column itself


Frederico Fonseca
SysSoft Integrated Ltd

FAQ219-2884: How Do I Get Great Answers To my Tek-Tips Questions?
FAQ181-2886: How can I maximize my chances of getting an answer?

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close