on Sybase, I have a table containing a binary column.
Using convert(varchar(16384), convert(binary(16384), T1.TEXT)) as Text I can convert the data contained in to a string format.
Now there is my question: I need to select a string from this field as a new string containing specific words. How can I do it?
Let me take an example.
If I Suppose in one row the field contains the string "Output of this activity are txt files: the file orange.txt, the file black.txt and eventually the file red.txt", in output of my query I want the field as "orange.txt, black.txt, red.txt".
Is it possible to do it?
Thanks
You can't do this. This is because neither the BINARY nor the TEXT datatypes under Sybase allow sub-string searching or regular expression processing.
When you are storing character data, VARCHAR or UNIVARCHAR are always the better options. TEXT as a type should only ever be used if your TEXT fields are larger than your Sybase configured page size.
Related
I am currently attempting to compare certain values in a column from a query in access to a vector of strings to look for a match between any two values.
I used recordset.fields("column1") to access specific records from my desired column, but it seems like I am unable to get matches since the values are of different data types.
How do I convert the records from recordset.fields("column1") into a string?
Thanks!
If you are working in VBA, surround your value with the CStr() function which will return the value converted to string output.
I have a NotesNoteCollection containing the replication entries for a database. The field $ReplFormula is of type Formula (1536). Is there a way from a script using COM to convert that formula into a text representation?
You need to use a DXLexporter to convert the document to xml. Then you can read the formula from the resulting xml. There is no other way to do this
You can do this in memory by defining a stream as target for the export.
I need to create a long list of complex strings, containing the data of different fields in different places to create explanatory reports.
The only way I conceived, in Access 2010, is to save text parts in a table, together with field names to be used to compose the string to be shown (see line1 expression in figure). Briefly:
//field A contain a string with a field name:
A = "[Quantity]"
//query expression:
=EVAL(A)
//return error instead the number contained in field [Quantity], present in the query dataset
I thought doing an EVAL on a field (A), to obtain the value of the field (B) which name is contained in field A. But seems not working.
Any way exist?
Example (very simplified):
Sample query that EVAL a field containing other field names to obtain the value of the fields
Any Idea?
PS: Sorry for my english, not my mothertongue.
I found a interesting workaround in another forum.
Other people had same problem using EVAL, but found that it is possible to substitute a string with a field contents using REPLACE function.
REPLACE("The value of field Quantity is {Quantity}";"{Quantity}";[Quantity])
( {} are used only for clarity, not needed if one knows that words to be substituted do not compare in the string). Using this code in a query, and nesting as many REPLACE as many different fields one want to use:
REPLACE(REPLACE("<Salutation> <Name>";"<Salutation>";[Salutation]);"<Name>";[Name])
it is possible to embed fields name in a string and substitute them with the current value of that field in a query. Of course the latter example can be done more simply with a concatenation (&), but if the string is contained in a field instead that hardcoded, it can be linked to records as needed.
REPLACE(REPLACE([DescriptiveString];"[Salutation]";[Salutation]);"[Name]";[Name])
Moreover, it is possibile to create complex strings context-based as:
REPLACE(REPLACE(REPLACE("{Salutation} {Name} {MaidenName}";"{Salutation}";[Salutation]);"{Name}";[Name]);"{MaidenName}";IIF(Isnull([MaidenName]);"";[MaidenName]))
The hard part is to enumerate all the field's placeholders one wants to insert in the string (like {Quantity},{Salutation}, {Name}, {MaidenName}) in the REPLACE call, while with EVAL one would avoid this boring part, if only it was working.
Not as neat as I would, but works.
I'm looking to write a script for MATLAB that will import data from a csv file which has a first row containing string headers and the data in each of those columns is either string, date or numeric.
I want to then be able to filter the data in MATLAB according to instances of a particular string and number combination.
Any help appreciated!
Cheers!
I would recommend you to start with reading MATLAB documentation.
[num,txt,raw] = xlsread('myExample.xlsx')
Reads numeric, text and combined data, so, if your data is combined, then you need the cell array raw. After that, you do whatever you want with your cell array (Additional information is not provided since OP did not provide any specific information about the way the data would be filtered)
Try using readtable function in MATLAB.
It correctly imports csv file with header and mixed data type.
xlsread was imported by mixed csv file very incorrectly repeating the some rows while maintaining the same total rows.
I got this after searching for a long time:
MATLAB Central Question/Answer
I'm wondering if there is a way to convert an .xsxl file into .csv while preserving everything in its entirety.
I have a column that for some rows has values like 0738794E5 and when I convert it through "save as", the value turns to 7.39E+10. I understand that some values which have an "E" will be turned to the latter format but this conversion is no use to me since that "E" doesn't stand for exponentiation.
Is there a setting to preserve the values the way they are i.e. text/string?
One option is to create an additional (or replacement) column that has the target values either enclosed in double quotes or prepended by an alpha character.
The quotes or alpha character will guarantee that the problem values come in as text. When the csv file is opened, the quotes or alpha will still be there, so you would need to use a string operation (MID or RIGHT, probably) to recover the original string values.
My dilemma wasn't real and only appeared to be so.
When I convert the .xlsx into .csv and open the .csv, it shows the improperly-converted values.
However, when I run my application, read from the csv, and output what's been read, I get the values contained within the .xlsx just like I wanted.
I'm not sure how/why this is the way it is but it works now.