How can I select a table column by column header name with XPath?
My attempt is:
//table/tbody/tr/td[count(//table/thead/tr/th[.="$columnName"]/preceding-sibling::th)+1]
This is not working.
It always selects the first column no matter what value I provide for $columnName.
There is barely any information in this post, but my educated guess would be that
count(//table/thead/tr/th[.="$columnName"]/preceding-sibling::th)+1
is always equal to 1 because you use $columnName in quotes - which makes it a string, not a variable.
If this is indeed the problem, using
count(//table/thead/tr/th[.=$columnName]/preceding-sibling::th)+1
would solve it. If it doesn't, you really need to give more information - show the whole input document, indicate the programming language, show all of that code.
Related
I am having some trouble with a query in Crystal 2008. I have two tables with columns that are loosely related, both contain addresses. One table column is just a street name while the other is a street name plus some additional info. I want to find all records where these have the same street name and only show those. Example below:
Address
AddressB
123 St
123 St, ABC City
123 St
345 St, ABC City
I have tried using a formula such as below
if({AddressB} startswith {Address}) then {AddressB} else 'ERROR'
I have also tried this with LIKE and as well as * wildcards. Nothing seems to work. I will admit I am pretty amateur-ish with SQL and crystal so formulas are a new frontier for me writing reports. Also I should note that tables are linked appropriately with inner joins.
Any help would be greatly appreciated!
This should work. Perhaps your {Address} column is padded with spaces, so try:
IF ({AddressB} startswith Trim({Address})) THEN {AddressB} ELSE 'ERROR'
Test the effect of replacing the reference to the column name with the static text value that you "think" is in that column.
If you get a different behavior, what you think is in that column is not what is actually in that column. For example, the column might contain non-printable characters. You can get rid of those using the Replace function.
If you don't get a different behavior, then show us the expression with the static text values. That would allow us to replicate the behavior and understand the situation.
Note: the problem might be in your table join logic. If you have no join condition, then all records in TableA would join to all the records in TableB. In that case, you need to place the fields in the detail section to get a proper sense of what is being compared to what. Or rethink your join logic. Perhaps you should move one table to a subreport, or a SQL Expression instead of trying to include both tables in the main report.
I'm trying to clear the entire cell if it doesn't contain a given keyword.
I've managed to do this for one column:
Table.ReplaceValue(#"PrevStep",each [#"My Column"], each if Text.PositionOf([#"My Column"],"keyword")>-1 then [#"My Column"] else null,Replacer.ReplaceValue,{"My Column"})
The problem is I need to iterate/repeat that step for a number of columns... the number of columns may vary and column names also may be different every time. I can have all those column names put into a list but I'm not able to use it.
The solution I'm looking for may look like this
for each ColNam in MyColumnsList
Table.ReplaceValue(#"PrevStep",each [#"ColNam"], each if Text.PositionOf([#"ColNam"],"keyword")>-1 then [#"ColNam"] else null,Replacer.ReplaceValue,MyColumnsList)
next
but this is not the VBA code but Power Query M - and of course the problem is with #PrevStep as I would see it like a recursions... again... do not know how to process.
Is the path I follow correct or should it be done some other way
Thanks
Andrew
Unpivot your columns to turn all the columns into two columns. Apply your replacement to the single value column then pivot it back into the original format
I made a simple query to a remote database. The table where I make query has all fields with VARCHAR2. However, some fields returns "?" in characters like º, £. I checked enconding and get:
NLS_CHARACTERSET: AL32UTF8
NLS_NCHAR_CHARACTERSET:AL16UTF16
Checking my /etc/default/locale file. These are the results:
LANG="en_US.UTF-8"
LC_NUMERIC="pt_BR.UTF-8"
LC_TIME="pt_BR.UTF-8"
LC_MONETARY="pt_BR.UTF-8"
LC_PAPER="pt_BR.UTF-8"
LC_NAME="pt_BR.UTF-8"
LC_ADDRESS="pt_BR.UTF-8"
LC_TELEPHONE="pt_BR.UTF-8"
LC_MEASUREMENT="pt_BR.UTF-8"
LC_IDENTIFICATION="pt_BR.UTF-8"
The enconding from both edges are UTF-8. Is there another configuration that I missing?
When you say 'some fields return "?" in characters like ...' I assume that is shown on your screen, right? You don't know what is REALLY returned, you only know what's on your screen.
To see what is REALLY returned, you could do something like
select dump('£500') from dual;
DUMP('£500')
--------------------------
Typ=96 Len=4: 163,53,48,48
EDIT: As discussed in the comments below, if you type EXACTLY that command at your terminal and you do, in fact, have a display problem, you will see garbage on the way in. Rather, to see what is stored in the database, you must refer to an actual table, and a column that has those string values in it. For example if the column name is COL1 in the table TBL, and there is also an ID column and for ID = 1000 you have a COL1 value with the pound sign in it, run
select dump(COL1) from TBL where ID = 1000;
Obviously, there are no issues with the INPUT since the input no longer has a pound sign in it (like my first example did). But on the way out, the DUMP may show the proper character is there - however your display is not able to show it correctly.
END EDIT
If you see the code 163 in the DUMP, that means the pound sign is stored correctly in the database, and the issue is just how it is displayed on your screen. In that case, you may have an issue with your NLS_LANG setting. There is excellent information here:
http://www.oracle.com/technetwork/products/globalization/nls-lang-099431.html
If you find that you have to work with different character sets often, you may benefit from reading this article carefully. It will show you how to find out what your current character set is, how to change it, and why the "obvious" things one would look at are in fact not very helpful. The issue is not too complicated, but not trivial either.
I need an urgent help from you guys, the thing i have a column which represent the full name of a user , now i want to split it into first and last name.
The format of the Full name is "World, hello", now the first name here is hello and last name is world.
I am using Derived Column(SSIS) and using Right Function for First Name and substring function for last name, but the result of these seems to be blank, this where even i am blank. :)
It's working for me. In general, you should provide more detail in your questions on places such as this to help others recreate and troubleshoot your issue. You did not specify whether we needed to address NULLs in this field nor do I know how you'd want to interpret it so there is room for improvement on this answer.
I started with a simple OLE DB Source and hard coded a query of "SELECT 'World, Hello' AS Name".
I created 2 Derived Column Tasks. The first one adds a column to Data Flow called FirstCommaPosition. The formula I used is FINDSTRING(Name,",", 1) If NAME is NULLable, then we will need to test for nullability prior to calling the FINDSTRING function. You'll then need to determine how you will want to store the split data in the case of NULLs. I would assume both first and last are should be NULLed but I don't know that.
There are two reasons for doing this in separate steps. The first is performance. As counter-intuitive as it sounds, doing less in a derived column results in better performance because the SSIS engine can better parallelize the operations. The other is more simple - I will need to use this value to make the first and last name split so it will be easier and less maintenance to reference a column than to copy paste a formula.
The second Derived Column is going to actually perform the split.
My FirstNameUnicode column uses this formula (FirstCommaPosition > 0) ? RTRIM(LTRIM(RIGHT(Name,FirstCommaPosition))) : "" That says "If we found a comma in the preceding step, then slice out everything from the comma's position to the end of the string and apply trim operations. If we didn't find a comma, then just return a blank string. The default string type for expressions will be the Unicode (DT_WSTR) so if that is not your need, you will need to cast the resultant into the correct string codepage (DT_STR)
My LastNameUnicode column uses this formula (FirstCommaPosition > 0) ? SUBSTRING(Name,1,FirstCommaPosition -1) : "" Similar logic as above except now I use the SUBSTRING operation instead of RIGHT. Users of the 2012 release of SSIS and beyond, rejoice fo you can use the LEFT function instead of SUBSTRING. Also note that you will need to back off 1 position to remove the comma.
I'm building a report where I have a subreport. This subreport brings some data through XPath, this means it's everything strings from a XML. One of the columns of this subreport has some values, where I need do sum them and show in the end of the table.
I don't know how to put this to work. I've tried to create a variable with sum parameter, but it does not work.
Did anybody need this before?
Scenario:
I load a lot of values from a XPath query, e.g:
/something/something1/something2
This query returns some fields according to my needs. With them I build a table (in a subreport). The problem is: the last column (4), values are strings from XML.
iReport version: 3.0.0
Really thanks!
Solution:
What I needed? According to the original post, a column with strings read from a XML through XPath and a footer with the sum.
Result from column SUM
What to do? Create a variable where you'll keep your sum. After created, edit it. e.g:enter image description here
Fill variable expression with the format you need. Here I used
new BigDecimal($F{theFieldToSum});
Click ok. Now the variable is created, you must create a new TextField where you'll show your sum. Create it and edit it. Here I used the following format:
new java.text.DecimalFormat("#,##0.00").format($V{theVariableYouCreatedBefore})
Click "Apply" and that's all. Compile your report and now you'll have the expected result. For sure, you can do some adapt, but in general this is the process.