I have a datetime field that may be blank. when it is not blank I want to show only the date portion. I used:
=FormatDateTime(Fields!myDate.Value, DateFormat.ShortDate)
This works except for blank entries which are replaced by "1/1/0001".
I used a switch statement but it returns an error when the condition is met. The switch statement is:
=switch(Fields!myDate.Value<>"", FormatDateTime(Fields!myDate.Value, DateFormat.ShortDate))
This works for the blanks but yields an error for datetime entries.
The workaround is to change the stored procedure to return only the date for the datetime field. I would prefer to have the time value in case it is needed in the future.
Please let me know what I'm doing wrong or if there is a report builder solution that works.
=IIF(Fields!myDate.Value Is Nothing, "", Format(Fields!myDate.Value,
"dd/MM/yyyy"))
Please mark as duplicate. This is a duplicate answer of my similar question (with Answer by Jeffrey Van Laethem) "SSRS expression fails for IIF date with #error"
Related
I'm trying to insert some information to MySQL with Pascal, but when I run the program I get the error
unknown column 'mohsen' in field list
This is my code
procedure TForm1.Button1Click(Sender: TObject);
var
aSQLText: string;
aSQLCommand: string;
namee:string;
family:string;
begin
namee:='mohsen';
family:='dolatshah';
aSQLText:= 'INSERT INTO b_tbl(Name,Family) VALUES (%s,%s)';
aSQLCommand := Format(aSQLText, [namee, family]);
SQLConnector1.ExecuteDirect(aSQLCommand);
SQLTransaction1.Commit;
end;
How can I solve this problem?
It's because your
VALUES (%s,%s)
isn't surrounding the namee and family variable contents by quotes. Therefore, your back-end Sql engine thinks your mohsen is a column name, not a value.
Instead, use, e.g.
VALUES (''%s'',''%s'')
as in
Namee := 'mohsen';
Family := 'dolatshah';
aSQLText:= 'INSERT INTO b_tbl(Name,Family) VALUES (''%s'',''%s'')';
aSQLCommand := Format(aSQLText,[namee,family]);
In the original version of my answer, I explained how to fix your problem by "doubling up" single quotes in the Sql you were trying to build, because it seemed to me that you were having difficulty seeing (literally) what was wrong with what you were doing.
An alternative (and better) way to avoid your problem (and the one I always use in real life) is to use the QuotedStr() function. The same code would then become
aSQLText := 'INSERT INTO b_tbl (Name, Family) VALUES (%s, %s)';
aSQLCommand := Format(aSQLText, [QuotedStr(namee), QuotedStr(family)]);
According to the Online Help:
Use QuotedStr to convert the string S to a quoted string. A single quote character (') >is inserted at the beginning and end of S, and each single quote character in the string is >repeated.
What it means by "repeated" is what I've referred to as "doubling up". Why that's important, and the main reason I use QuotedStr is to avoid the Sql db-engine throwing an error when the value you want to send contains a single quote character as in O'Reilly.
Try adding a row containing that name to your table using MySql Workbench and you'll see what I mean.
So, not only does using QuotedStr make constructing SQL statements as strings in Delphi code less error-prone, but it also avoid problems at the back-end, too.
Just in case this will help anybody else I had the same error when I was parsing a python variable with a sql statement and it had an if statement in i.e.
sql="select bob,steve, if(steve>50,'y','n') from table;"
try as I might it coming up with this "unknown column y" - so I tried everything and then I was about to get rid of it and give it up as a bad job until I thought I would swap the " for ' and ' for "..... Hoooraaahh it works!
This is the statement that worked
sql='select bob,steve, if(steve>50,"y","n") from table;'
Hope it helps...
To avoid this sort of problem and SQL injection you should really look into using SQL parameters for this, not the Pascal format statement.
I have a two tables in first table i filled the values with name id,
on second table if i gave the id the table needs to fill the name automatically, how can i do this please help.
You commented that the error is in the following line:
axsl.TransDate = DateTimeUtil::utcNow();
This is logic because axsl.TransDate is Date and DateTimeUtil::utcNow() return a UtcDateTime when you compile get this error Operand types are not compatible with the operator.
There are many ways to fix this error.
Try this:
axsl.TransDate = DateTimeUtil::date(DateTimeUtil::utcNow())
DateTimeUtil::date() convert UtcDateTime in Date.
or you can use today() method to return the actual date.
What is wrong with my code:
ExecSql('DELETE FROM STLac WHERE RegN=99 AND BegDate>= 2016-12-14');
This runs, but deletes ALL the rows in STLac for RegN, not just the rows with BegDate on or after 2016-12-14.
Originally I had:
ExecSql('DELETE FROM STLac WHERE RegN=99 AND BegDate>= :myDdate,[myDate]);
which has the advantage I hoped of not being particular to the date format. So I tried the literal date should in the format SQLite likes. Either way I get all rows deleted, not just those on or after the specified date.
Scott S.
Try double quote while putting date. As any value must be provided in between quotes until and unless that column is not int
ExecSql('DELETE FROM STLac WHERE RegN=99 AND BegDate>= "2016-12-14"');
SQLite does not have datetime format as such, so you have to figure out how date is actually represented in the table and change your query to provide the same format. First execute the "select" statement in some kind of management tool,
select * from STLac where RegN = 99 and BegDate >= '2016-12-14' --(or '2016.12.04' or something else)
which displays the result in the grid; when you see the expected rows, change it to "delete" query and copy into your Delphi program.
I am currently writing a block of code on R which collects data via a SPARQL query. My problem is when I am trying to filter the query by date, R gives an error of "unexpected numeric constant".
There is no any mistake in the SPARQL code because when I run the exact code on the endpoint I receive data normally.
You will find the block of code where I have the problem. It does not matter the lines before and after, just the second line of the date filter.
...
OPTIONAL {?seller gr:legalName ?sellerLegalName} .
FILTER REGEX (STR(?date) >= "2015-01-01") .
FILTER NOT EXISTS {?spendingItem elod:hasCorrectedDecision ?correctedDecision} .
...
Please, I would kindly ask for your help! :)
For any further information that you want in order to solve the problem, feel free to contact with me.
Thank you all!!!
SOLVED!
I found that the date should be passed as timestamp!
Also, I found a useful site where you can convert any date in timestamp and vice versa.
I would like to thank you all for your responses and your useful help!
You should filter it as a date/time value rather than as a string - perhaps that will help:
FILTER (?date > "2015-01-01"^^xsd:date)
See this answer: SPARQL date range
I am trying to set a label in a gridview not to show a particular date if it is returned (it is because it is a default date and is not needed).
The code I have used is
<%# 'Convert.ToString(Eval("DateTaken")).Equals("01/01/1899") ? "" : Eval("DateTaken")'%>
Unfortunately, when I try and compile it the code won't run. I have tried to find an answer by research, but have not been able to do so.
It uses part of Chris's answer, but Equals does not work. Changing this to Contains does when parsing the value as year
<%# 'Convert.ToString(Eval("DateTaken")).Equals("01/01/1899") ? "" : Eval("DateTaken")'%>
This is not valid syntax as far as I am aware. You have single quotes ' wrapping your statement which is likely confusing the parser a lot. I'm not sure what you intend them to be doing but I'd suggest trying without:
<%# Convert.ToString(Eval("DateTaken")).Equals("01/01/1899") ? "" : Eval("DateTaken")%>
I can't test this but it looks like it should work.
Also for the comparison (I assumed you'd tested that elsewhere first) I suspect you may have problems with the fact that Convert.ToString likely includes a time element. Instead I would suggest specifying what string format you want to be outputted. Or even better assuming that it is a DateTime you are getting back compare it as a DateTime. Either of the following should work as a reliable comparison
(((DateTime)Eval("DateTaken")).ToString("yyyy-MM-dd")=="2014-03-05")
(((DateTime)Eval("DateTaken")).Date==new DateTime(2014,03,05))