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Posted by Arnie Rowland on 08/16/06 05:47
In my many years of teaching SQL Server, I have only had to ask one person
to leave a class and not come back. He was a Oracle person that wanted to
argue every point, always telling me why Oracle was better. I didn't think
that he really wanted to learn about SQL Server.
Flow Control (WHILE, IF, ELSE) executes the next 'block' of code. A block of
code is EITHER a single complete command (even if on several lines) OR
several commands within a BEGIN...END block.
WHILE does not have a END.
Your code example has an END statement, leading me to believe that your
overlooked the BEGIN in the sample code that you are working with. As Steve
pointed out, your code is stuck in the act of endlessly printing the
@CustomerID.
Semi-Colons are optional as end of statement indicators. If you want to use
them, please do.
As indicated above, BEGIN and END statements are indicators of code block,
containing one or more command statements. BEGIN...END blocks can be nested.
I personally think that there are many, many strange and different things
about P-SQL. Some of them intuitive to use, others not quite so. I also
think the same about T-SQL. But when I need a screwdriver, I don't go around
fussing about why a hammer is better. I use the correct tool for the job,
respectful of its limitations.
--
Arnie Rowland, Ph.D.
Westwood Consulting, Inc
Most good judgment comes from experience.
Most experience comes from bad judgment.
- Anonymous
<dba_222@yahoo.com> wrote in message
news:1155705604.376022.275910@h48g2000cwc.googlegroups.com...
> Thanks for looking and responding.
> Ok, This is part of what I wrote (as I posted).
> I ran it in Query Analyser.
>
> The symptom, as I mentioned, was not an error.
> It was an infinite loop. (Has no one copied, and
> pasted it???)
>
> While @@fetch_status = 0
>
> Print @customerid
>
> Fetch all_cust
> Into @customerid,
> @Companyname,
> @ContactName
>
> End /* while */
>
> The idea being, that the while is supposed to start at While,
> and finish at End. Exactly what I found online.
>
> Are you saying that a while loop can only handle one statement??
>
> If not, what is the syntax to get it to execute all the code between
> the While, and the End??? Do we give it a Begin???
>
> These are some of the strange things I've found with Sql Server.
> No semicolons to indicate the end of statement.
> And no Begin or End to indicate the start and end of a block.
> Much more difficult to read, and to write. In Oracle, you MUST
> have an END LOOP statement, and semicolons.
> You must also start and end the procedure with BEGIN and END.
> Otherwise it won't even compile.
>
>
>
>
>
> Steve Kass wrote:
>> See inline comments. You are being sloppy, to but it bluntly.
>> You can't expect programs to work if you miss copying a
>> line, leave out begin-end pairs, or make other basic errors.
>>
>> Steve Kass
>> Drew University
>>
>> <dba_222@yahoo.com> wrote in message
>> news:1155688502.341846.321810@75g2000cwc.googlegroups.com...
>> > Dear experts,
>> >
>> > Again, sorry to bother you again with such a seemingly dumb question,
>> > but I'm having some really mysterious results here.
>> >
>> > ie.
>> >
>> > Create procedure the_test
>> > As
>> >
>> >
>> > Begin
>> >
>> > Select CustomerID
>> >>From dbo.customers
>> >
>> > -----------------------------*/
>> > Server: Msg 170, Level 15, State 1, Procedure the_test, Line 8
>> > Line 8: Incorrect syntax near 'customers'.
>> >
>> > Just WHAT is the syntax please?????
>> >
>> >
>>
>> It looks to me like you are missing the keyword END.
>>
>>
>> > -----------------------------------------
>> >
>> > Then, this started as trying to write a procedure with a cursor.
>> > Open cursor, loop, print, end loop. End of story.
>> >
>> > This actually goes into an infinite loop!!!
>> > Can anyone tell me what is wrong here?
>> >
>> >
>> >
>> >
>> > Create procedure test2
>> > As
>> >
>> > Declare all_cust cursor for
>> > Select customerid,
>> > Companyname,
>> > ContactName
>> >>From customers
>> >
>> >
>> > Declare
>> > @Customerid varchar(5),
>> > @Companyname varchar(40),
>> > @ContactName varchar(30)
>> >
>> >
>> >
>> > Begin
>> >
>> > Select count(*)
>> >>From customers
>> >
>> >
>> > Open all_cust
>> >
>> > Fetch all_cust
>> > Into @customerid,
>> > @Companyname,
>> > @ContactName
>> >
>> >
>> > While @@fetch_status = 0
>> >
>> > Print @customerid
>>
>>
>> This is an infinite loop if anything is fetched. Printing @customerid
>> will not change the value of @@fetch_status, so the statement
>>
>> WHILE @@fetch_status = 0
>> PRINT @customerid
>>
>> will go forever.
>>
>>
>>
>> >
>> >
>> > Fetch all_cust
>> > Into @customerid,
>> > @Companyname,
>> > @ContactName
>> >
>> > End /* while */
>> >
>> >
>> > Close all_cust
>> >
>> > Deallocate all_cust
>> >
>> >
>> >
>> >
>> >
>> > Believe it or not, I'm just copying simple programs off the web,
>> > including the Microsoft website, with slight modifications!!!!!!
>> > Crazy!!!
>> >
>
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