microsoft+access+course+london - Query

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Query

Vicky has attended:
Access Introduction course

by - delegate Vicky [1 post] (2007 Feb 7 Wed, 10:09) Reply

What is a query? Is it Access-specific terminology?

Version	Date	Location	Places available	Book	Next place rate:
Access Intermediate 1 day course
Version	Date	Location	Places available	Book	Card	Invoice
2003	2008 Sep 2 Tue	Southwark	3	book now	£210	£215
2003	2008 Sep 9 Tue	Bloomsbury	6	book now	£193	£215
2002/XP	2008 Sep 11 Thu	Tooting	0	FULL
2003	2008 Sep 19 Fri	Bayswater	5	book now	£195	£205
2007	2008 Sep 23 Tue	Bloomsbury	5	book now	£212	£224
2002/XP	2008 Sep 24 Wed	Tooting	0	FULL
Full Schedule: See all 73 Access Intermediate course dates. Bookings currently available until 24th November 2009.

RE: Query

by - trainer Garry gold contributer [188 posts] (2007 Feb 7 Wed, 10:54) Reply

a Query is a question which you ask your database
Microsoft Access supports many types of queries. Here is a description of the major categories:

Select Queries
Retrieve records or summaries (totals) across records. Also includes cross-tabulations.
Make Table Queries
Similar to Select queries but results are placed in a new table.
Append Queries
Similar to Select queries but results are added to an existing table.
Update Queries
Modify data in the records.
Delete Queries
Records are deleted from a table.

it is not Access-specific terminology

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Access tip:

Calculating The Difference Between Dates

If you wish to calculate the time between two date fields, this can be done in a number of ways:

1. As a calculated field in a query
2. As a calculated control in a form or report
3. As a calculation in a VBA procedure.

The basic syntax to get the number of days between two dates is:

=[One Date Field] - [Another Date Field]

You can also use one of the following functions:

=Month([One Date Field] - [Another Date Field])
which calculates the number of months between the two fields

=Year([One Date Field] - [Another Date Field])
which calculates the number of years between the two fields.

Another function is the DateDiff() function.

It uses an argument to determine how the time interval is measured. For example:

=DateDiff("q",[One Date Field] - [Another Date Field])
returns the number of quarters between the two fields.

Other intervals that can be used in this expression are as follows:
"yyyy" - Years
"m" - Months
"d" - Days
"w" - Weekdays
"ww" - Weeks
"h" - Hours
"n" - Minutes
"s" - Seconds