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Full Discussion: SQL selective replace
Top Forums UNIX for Dummies Questions & Answers SQL selective replace Post 302880601 by rsi.245 on Saturday 21st of December 2013 01:49:05 AM
Old 12-21-2013
SQL selective replace

Hi

I have a table which looks like this
Code:
id | name | length | clone | null
1 | string 1 | 12345643 | string 1 | NULL |
2 | string 2 | 2345612 | string 2 | NULL |
3 | string 3 | 3421556 | string 3 | NULL |
4 | string 4 | 1236742 | string 4 | NULL |
5 | string 5 | 2312677 | string 5 | NULL |
6 |string 6 | 12786315 | string 6 | NULL |
7 | string 7 | 2341135 | string 7 | NULL |
8 |string 8 | 452189 | string 8 | NULL |
9 |string 9 | 124343 | string 9 | NULL |
10 | string 10 | 3432344 | string 10 | NULL |
.....

I wanted to replace all names columns having id> 5 to sequence.
Keep the first 5 entries the same but replace all others name = "sequence[id]"
and clone entry to be changed as clone = "sequence[id]"
The table should look like this

Code:
id | name | length | clone | null
1 | string 1 | 12345643 | string 1 | NULL |
2 | string 2 | 2345612 | string 2 | NULL |
3 | string 3 | 3421556 | string 3 | NULL |
4 | string 4 | 1236742 | string 4 | NULL |
5 | string 5 | 2312677 | string 5 | NULL |
6 |sequence 6 | 12786315 | sequence 6 | NULL |
7 | sequence 7 | 2341135 | sequence 7 | NULL |
8 |sequence 8 | 452189 | sequence 8 | NULL |
9 |sequence 9 | 124343 | sequence 9 | NULL |
10 | sequence 10 | 3432344 | sequence 10 | NULL |



i did use this command
Code:
UPDATE tablename 

SET name = "sequence[id]"
where id >5;

What is my error?

Please do advise.

Last edited by Scott; 12-21-2013 at 05:09 AM.. Reason: Please use code tags
 
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ststring(3)						    ShapeTools Toolkit Library						       ststring(3)

NAME
stConvertPattern, stSubstituteString, stStrtok, stStrEnter - string handling SYNOPSIS
#include <config.h> #include <sttk.h> char* stConvertPattern (char *pattern); char* stSubstituteString (char *original, char *old, char *new); char* stStrtok (char *string); char* stStrEnter (char *string); DESCRIPTION
stConvertPattern converts sh(1) filename generation patterns to ed(1) string patterns. question (?) gets converted to period (.) asterisk (*) gets converted to a period followed by an asterisk (.*) period (.) will be escaped by a backslash character (.). exclam (!) gets converted to circumflex (^) if it follows an left bracket ([). Otherwise it remains unmodified. The whole pattern will be enclosed in a circumflex (^) as leftmost an a dollar sign ($) as rightmost character. stSubstituteString replaces all occurrences of substring old in original by string new. It returns a pointer to an allocated string that is the result of this operation. Returns NULL if anything goes seriously wrong. stStrtok considers the string string to consist of a sequence of zero or more text tokens separated by whitespace. The first call (with pointer string specified) returns a pointer to the first character of the first token, and will have written a null character into string immediately following the returned token. The function keeps track of its position between separate calls, so that subsequent calls (which must be made with the string argument set to NULL) will work through the string immediately following that token. In this way subsequent calls will work through the string until no tokens remain. When no token remains in string, a NULL pointer is returned. stStrEnter adds the given string to an internal string table and returns a pointer to appropriate string table entry. Equal strings are mapped to equal locations in the table. Equality of two strings in the string table can be checked by simple pointer comparison. SEE ALSO
sh (1), ed (1) sttk-1.7 Thu Jun 24 17:43:33 1993 ststring(3)

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