topic Re: Select rows based on first character in Discussions

Select rows based on first character

ab0716 — Fri, 21 Sep 2018 22:31:11 GMT

Hi I have a column with a lot of numbers and some text. Below is a snipet of what my data looks like. I'm tring to hide and exclude all rows that aren't 7 digits long and don't start with 5 (i.e. I only want numbers like 5******).

5238403
5236577
3238403
ASKU
523660682
asku
2536614
NI
5236610

So far I know how to exclude all the rows that aren't 7 characters long, but I can't figure out how to select the rows that don't begin with 5 (e.g. 2536614).

dt<<select where(length(:column) != 7 );

dt<< hide and exclude (1);

Re: Select rows based on first character

vince_faller — Fri, 21 Sep 2018 23:48:54 GMT

dt<<select where(length(:column) != 7 & left(:Column, 1) != "5");

Re: Select rows based on first character

ab0716 — Sat, 22 Sep 2018 02:48:30 GMT

For some reason that solution still left a few numbers that didn't fit my criteria, but when I split it up as two separate lines it works great! Thanks!

dt <<select where(left(:column, 1) != "5" );
dt <<select where(length(:column) != 7, current selection("extend") );

Re: Select rows based on first character

gzmorgan0 — Sun, 23 Sep 2018 08:55:38 GMT

If the lot number must be 7 numeric digits, what begins with 5, one more condition needsto be added.

dt = current data table();

dt<<select where(length(:Column 1) != 7 | left(:Column 1, 1) != "5" | IsMissing(num(:Column 1)));

Also, new column using a formula can find matches using Regex. Column 2 of the table displayed below, uses the formula

Regex( :Column 1, "(5\d{6}\b)", "\0" ). the selected rows are those selected by the Select Where() command above.

Note row 10, 5Z3661A, would not be selected without the additional criteria IsMissing(num(:Column 1))