3. database
DESCRIPTION
DatabasesTRANSCRIPT
Where we left it 2 weeks agao
We found duplicates with a pivot table
We found duplicates with a pivot tableAnd replaced those with a VLOOKUP
There are other ‘problems’ here
A spreadsheet
is not perfect for
‘repeatable’ analysis
But I want a filter
But I want a filter
And another one
Suppose I need these two values
Manually filter
Two pivot tables
Two pivot tables
Suppose I need these two values
Suppose I need these two valuesEvery week
on new data
Don’t paste!
Don’t
paste!Use a...
Included in Office
(Professional and higer)
Definitely not the only
database!
No grid?
We have tomake tables
Okay, we could paste
Instead of pasting, we can import!
Designed for repeated tasks
As always,
tools are no
substitute
for thinking!
WUUUU
UT?
A bit of
theory
A bit of
theory
Relationship
Key
Key
Key
Key
Foreign key Foreign
key
Key
Key
Foreign keys
We can do a VLOOKUP,
because we know there
is a corresponding ‘8’ in
the settings
This relationship expresses that knowing
Excel does not
know nor
validate
Databases do
validate
Access knows!
There are 1-to-1 relationships as well
We distilled the
model from
data
More often,
you model
upfront
I expect you to be able to make a diagram, based on data or story
Okay, we have a
Okay, we have a
Now what?