Comments on: Best way to retrieve values, SQL or Queries and how? http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/ Sat, 25 May 2013 17:28:03 +0000 hourly 1 By: bug68 http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-69884 bug68 Tue, 03 Nov 2009 13:11:19 +0000 #comment-69884 Hi, again

thanks Tom for you tip, this select instruction are very usefull, and for my needs work well.
Normally i use the suggestion of CharlieBrowne inside of programs but in that case i need this for quit solution.

thank everybody.

]]> By: ronkoontz http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-69859 ronkoontz Mon, 02 Nov 2009 20:30:18 +0000 #comment-69859 In query400 use the Like keyword.

]]> By: bug68 http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-69349 bug68 Thu, 22 Oct 2009 11:18:36 +0000 #comment-69349 thanks Tom for this, i will try test and then send my comments.

bug68

]]> By: tomliotta http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-69321 tomliotta Wed, 21 Oct 2009 20:56:50 +0000 #comment-69321 SELECT sourceColumn , posstr(sourceColumn,'60F:')+length('60F:') as locS, locate(' :',sourceColumn, posstr(sourceColumn,'60F:') ) as locE, substr(sourceColumn, posstr(sourceColumn,'60F:')+length('60F:'),locate(' :',sourceColumn, posstr(sourceColumn,'60F:') ) -length('60F:') -1) as extractSubstring FROM sourceTable

I used sourceColumn as the name of the column you’re extracting from and sourceTable as the name of the table. The first three columns in the select-list are there just for visual comparison.

posstr(sourceColumn,’60F:’) is where the first search-string starts
locS is the starting position of your extract-string in sourceColumn
locE is the position of the ending search-string in the substring beginning where the first search-string starts

extractSubstring is all you should need. Where I used [length('60F:')], you can probably just use the constant length of ’60F:’ which is (4).

Regardless, I probably wouldn’t do it this way. If it needed to be done in SQL, I’d create a UDF() and code the logic. Along with the logic, I’d explain what in the world I was doing.

With a UDF(), you could also pass in any search values; you wouldn’t be limited to ’60F:’ nor ‘ :’. A UDF() could test to ensure that ’60F:’ appeared in the source string and that ‘ :’ was in a position after the first search-string.

Trying to make this work in a single SQL statement is asking for trouble when the first minor change in specs comes along. I’m not sure I even like trying to explain here what the above statement does! Very ugly, eh?

Tom

]]> By: charliebrowne http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-68959 charliebrowne Mon, 12 Oct 2009 20:02:36 +0000 #comment-68959 Then I would say you should scan for ‘ :60F:’
The more data you can include in the scan, the better chance you have of not changing something incorrectly.
Now once you fine the starting position in the string, you can rplace the value.

]]> By: bug68 http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-68951 bug68 Mon, 12 Oct 2009 17:20:25 +0000 #comment-68951 HI,

about your question, Tom, yes always trailing blanks and a colon after the value.

thanks

]]> By: tomliotta http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-68847 tomliotta Thu, 08 Oct 2009 21:58:05 +0000 #comment-68847 Is there always trailing blanks and a colon after the value? Or is the leading colon for the next segment the only delimiter?

Tom

]]> By: graybeard52 http://itknowledgeexchange.techtarget.com/itanswers/best-way-to-retrieve-values-sql-or-queries-and-how/#comment-68590 graybeard52 Thu, 01 Oct 2009 23:04:42 +0000 #comment-68590 To find it in RPG, use the %scan to scan for the string. It returns the position the string is found.

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