Solved

SQL - date

Posted on 1998-02-04
4
134 Views
Last Modified: 2010-04-04
Why does the following reports 'mismatch is expression':

select * from customers
where customers.'entry date' < '01-01-1998'
0
Comment
Question by:lagen004
  • 2
4 Comments
 
LVL 8

Accepted Solution

by:
ZifNab earned 50 total points
ID: 1358260
hi lagen004,

SELECT *
FROM customers
WHERE customers.'entry date' < {TDateTime = Integer}

You must give an integer value, not a string value, because dates or in TDateTime formats. You get the TDateTime format of '01-01-1998' by calling StrToDate('01-01-1998') or StrToDateTime()

Regards,
Zif.

0
 

Expert Comment

by:buliang
ID: 1358261
try following

SELECT * FROM customers
WHERE customers.'entry date' < '1-jan-1998'

this may work under bde3.0 and higher
0
 
LVL 1

Expert Comment

by:RJENKINS
ID: 1358262
SQL needs a specific format for Dates

'MM/DD/YYYY' , 'MM/DD/YY' or 'dd-MMM-YYYY'

SELECT * FROM customers
WHERE customers.'entry date' < "01/01/1998"

For ZifNab:- TDateTime is Float NOT and Integer

and what you have written is not a legal SQL statement.

RCJ


0
 
LVL 8

Expert Comment

by:ZifNab
ID: 1358263
RJENKINS, correct about integer, my mistake, it's double.
and pardon me, it worked in my test program.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this tutorial I will show you how to use the Windows Speech API in Delphi. I will only cover basic functions such as text to speech and controlling the speed of the speech. SAPI Installation First you need to install the SAPI type library, th…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

896 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now