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5fingers wrote: What is the best precise method of converting bit(0 or 1) from sql(row array text cell) to boolean value.
Probably by asking it in the correct forum and by reading the message at the top of the page that says...
Please do not post programming questions here.
------------------------------------
I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave
CCC Link[ ^]
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1. create table test(name varchar(20),status bit not null)
assume status has value 0 or 1. then fill to a dataset.
Bind a gridview directly to dataset.
Column status shows true or false on gridview which is ok.
To retrieve the status value from gridviewrow.cells[1].text return empty string.
Confirm.
I only read newbie introductory dummy books.
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See here[^]
Every man can tell how many goats or sheep he possesses, but not how many friends.
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See here[^].
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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My middle one, to be exact.
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1. create table test(name varchar(20),status bit not null)
assume status has value 0 or 1. then fill to a dataset.
Bind a gridview directly to dataset.
Column status shows true or false on gridview which is ok.
To retrieve the status value from gridviewrow.cells[1].text return empty string.
Confirm.
I only read newbie introductory dummy books.
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You need to spend some time with your debugger to figure out exactly where this is going wrong and why. Check all the possible values in your objects at each stage, in particular check whether gridviewrow.cells[1] actually has a text value that can be returned.
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Wow, you are long enough here on CP to know the rules, but no, you have to misbehave again and again, and then you complain why you got constantly downvoted? 
"I love deadlines. I like the whooshing sound they make as they fly by." (DNA)
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1. create table test(name varchar(20),status bit not null)
assume status has value 0 or 1. then fill to a dataset.
Bind a gridview directly to dataset.
Column status shows true or false on gridview which is ok.
To retrieve the status value from gridviewrow.cells[1].text return empty string.
Confirm.
I only read newbie introductory dummy books.
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iam having ntext column in my database
that store uniqueidentifier value seprated with ,
so i create function to split this ntext value in local table which each row have 1 uniqueidentifer value
but i have error when i try to create local variable of type ntext
The text, ntext, and image data types are invalid for local variables
i need any help to solve my problem
md_refay
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Dear all,
Please suggest me to write shortest and effective query in Storeprocedure.
To assign value to @Color, there will be different select queries with different conditions, My query sample will be as the following,
Select @result=count(*) from table where condition1
IF @result = 20
Begin
@Color='Red Color'
End
Else
Begin
select @result=count(*) from table where condition2
IF @result=20
Begin
@Color='Blue Color'
End
Else
Begin
select @result=count(*) from table where condition3
IF @result>0
Begin
@Color='Blue Color'
End
Else
Begin
Select @result=count(*) from table where Condition4
IF @result>0
Begin
@Color='Blue Color'
End
Else
Begin
Select @result=count(*) from where Condition5
IF @result=20
Begin
@Color='Green Color'
End
Else
Begin
Select @result=count(*) from where Condition6
IF @result>0
Begin
@Color='Yellow Color'
End
Else
Begin
@Color='Orange Color'
End
End
End
End
End
End
Thanks and best regards
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You should let us know what database you are using.
Look into CASE if you are using SQL Server
Never underestimate the power of human stupidity
RAH
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Thank you for your reply.
So far what I've found CASE are use like below
SELECT Category =
CASE type
WHEN 'popular_comp' THEN 'Popular Computing'
WHEN 'trad_cook' THEN 'Traditional Cooking'
ELSE 'Not yet categorized'
END
UPDATE HumanResources.Employee
SET VacationHours =
( CASE
WHEN ((VacationHours - 10.00) < 0) THEN VacationHours + 40
ELSE (VacationHours + 20.00)
END
)
But, I have no idea how to use in my query.
Could you please give me some samples by using my scenarios?
Thanks and best regards
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Using your second format you basically take your where clauses and place them between WHEN and THEN
UPDATE HumanResources.Employee
SET VacationHours =
( CASE
WHEN whereclause1 THEN VacationHours + 40
WHEN whereclause2 THEN VacationHours + 10
WHEN whereclause3 THEN VacationHours + 19
WHEN whereclause4 THEN VacationHours + 11
END
)
The complexity of the where clauses it going to drive you nuts, sequencing them correctly will be a pain and debugging is going to be bloody horrible. Good luck
Never underestimate the power of human stupidity
RAH
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Mycroft Holmes wrote: The complexity of the where clauses it going to drive you nuts, sequencing them correctly will be a pain and debugging is going to be bloody horrible
This is very true if the where clauses are even a bit complex...
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Absolutely right 
I'm at that situation now
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Instead of trying to combine everything to a giant statement, could you go the other way: brake it into pieces.
Don't know the whole situation, but could you for example create small, separate functions that fetch the desired info and in the 'main' logic use these functions (or procedures if you like). When you create the parameterized functions I would guess that at some point you notice the similarities between conditions if there are any so perhaps the amount of functions won't be as many as you now have different selects.
Also during the process you may find different kind of options to build the desired output that are now hard to see.
In any case, best of luck!
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I hope this is a great idea.
But to be honest I've never been used function and also not familiar.
I'm gonna learn it on my Weekend.
Any article or site you want to recommend?
Thanks again and have a nice weekend.
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Many thanks
Will try with yours suggestion also.
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What's the best way to combine these statements depends totally on the conditions you're going to use. For example if the conditions fetch different subsets from the tables and you have written the if statements in such order where they most likely are true, then combining the different selects could lower the performance.
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Thank you for you reply
Sorry, I didn't get what you mentioned. This are some of my many different conditions
WHERE Vessel_Code=@Vsl AND Voyage_No=@Voy AND POL=@POL AND (isNull(TDR_D20,0)= 0 And isNull(TDR_D40,0)=0 And isNull(TDR_D45,0)=0 And isNull(TDR_H20,0)=0 And isNull(TDR_H40,0)=0 And isNull(TDR_H45,0)=0) AND (isNull(FL_D20,0) =0 AND isNull(FL_D40,0)=0 AND isNull(FL_D45,0)=0 AND isNull(FL_H20,0)=0 AND isNull(FL_H40,0)=0 AND isNull(FL_H45,0)=0) AND (isNull(CLL_D20,0)=0 AND isNull(CLL_D40,0)=0 AND isNull(CLL_D45,0)=0 AND isNull(CLL_H20,0)=0 AND isNull(CLL_H40,0)=0 AND isNull(CLL_H45,0)=0)
WHERE Vessel_Code=@Vsl AND Voyage_No=@Voy AND POL=@POL AND (isNull(TDR_D20,0)>0 Or isNull(TDR_H20,0)>0 Or isNull(TDR_D40,0)>0 Or isNull(TDR_H40,0)>0 Or isNull(TDR_D45,0)>0 Or isNull(TDR_H45,0)>0) AND (isNull(FL_D20,0) =0 AND isNull(FL_D40,0)=0 AND isNull(FL_D45,0)=0 AND isNull(FL_H20,0)=0 AND isNull(FL_H40,0)=0 AND isNull(FL_H45,0)=0) AND (isNull(CLL_D20,0)=0 AND isNull(CLL_D40,0)=0 AND isNull(CLL_D45,0)=0 AND isNull(CLL_H20,0)=0 AND isNull(CLL_H40,0)=0 AND isNull(CLL_H45,0)=0)
WHERE Vessel_Code=@Vsl AND Voyage_No=@Voy AND POL=@POL AND (isNull(TDR_D20,0)=0 AND isNull(TDR_H20,0)=0 And isNull(TDR_D40,0)=0 And isNull(TDR_H40,0)=0 And isNull(TDR_D45,0)=0 And isNull(TDR_H45,0)=0) AND ((isNull(FL_D20,0)>0 OR isNull(FL_D40,0) >0 OR isNull(FL_D45,0) >0 OR isNull(FL_H20,0) >0 OR isNull(FL_H40,0) >0 OR isNull(FL_H45,0) >0) OR (isNull(CLL_D20,0) > 0 OR isNull(CLL_D40,0) > 0 OR isNull(CLL_D45,0) > 0 OR isNull(CLL_H20,0) > 0 OR isNull(CLL_H40,0) > 0 OR isNull(CLL_H45,0)>0))
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Ok,
If I take an example. Perhaps the easiest way to combine different statements would be to use union. For example if you have following logic (pseudo):
select @result = count(*) from table where column1 < 100
if @result > 10 then color = blue
else
select @result = count(*) from table where column1 > 100
if @result = 20 then color = yellow
Now you could combine these to something like:
cursor = select count(*) from table where column1 < 100
union all
select count(*) from table where column1 > 100
if first_row_in_cursor > 10 then color = blue
else if second_row_in_cursor = 20 then color = yellow
However, as you see, both select statements would get the count from different rows. In example 1 the second query isn't executed at all if count > 10. In the second example all the selects are executed even if the results in different portions aren't needed. This can be very time (and resource) consuming.
This was a trivial case and most likely isn't exactly the same as in your situation but the point I'm trying to make is that is it really beneficial to combine all the statements. Another point of view is that the statement may become very large and hard to maintain if it contains too much logic.
Another (perhaps an easy ) option is to use scalar queries. This might work more easily for your case. The previous example could be something like:
select
@result1 = (select count(*) from table where column1 < 100)
@ersult2 = (select count(*) from table where column1 > 100);
if @result1 > 10 then color = blue
else if @result2 = 20 then color = yellow
However the same performance problem as described earlier may arise.
The need to optimize rises from a bad design.My articles[^]
modified on Friday, August 12, 2011 6:43 AM
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