My query looks like this:
SELECT o.CustomerID, null emptyColumn, o.ShipFirstName, o.ShipCountry, c.EmailAddress
FROM Orders o, Customers c
WHERE o.CustomerID = c.CustomerID
And the results are like,
1,,John,United States,john@example.com
2,,Peter,Canada,peter@example.com
But I need to change "United States" to "US" and "Canada" to "Ca". How can I do this?
If it's for a large range of countries, then do a search for ISO country codes (for example) - import that data into a new table and then join to that table.
Or put your selection of countries into a CTE and join to that, e.g.,
WITH Countries(ISO_Code, ISO_Name) AS
(
SELECT
*
FROM (VALUES ('AF', 'AFGHANISTAN')
,('AX', 'ÅLAND ISLANDS')
,('AL', 'ALBANIA')
,('DZ', 'ALGERIA')
,('AS', 'AMERICAN SAMOA')
,('AD', 'ANDORRA')
,('AO', 'ANGOLA')
,('AI', 'ANGUILLA')
,('AQ', 'ANTARCTICA')
,('AG', 'ANTIGUA AND BARBUDA')) nTab(nCol1, nCol2)
)
SELECT
*
FROM Countries c
JOIN ...
You can use case,
SELECT o.CustomerID, null emptyColumn, o.ShipFirstName,
case when o.ShipCountry = 'United States' then 'US'
when o.ShipCountry = 'Canada' then 'CA'
end,
c.EmailAddress
FROM Orders o, Customers c
WHERE o.CustomerID = c.CustomerID
For anyone coming along this thread as I did and looking for state abbreviations instead of countries, here's a quick copy paste of all US states and Canadian provinces in WHEN/THEN format. Adapt to your own CASE statement needs.
CASE "YOUR COLUMN CONTAINING FULL STATE NAMES"
WHEN 'Alabama' THEN 'AL'
WHEN 'Alaska' THEN 'AK'
WHEN 'Arizona' THEN 'AZ'
WHEN 'Arkansas' THEN 'AR'
WHEN 'California' THEN 'CA'
WHEN 'Colorado' THEN 'CO'
WHEN 'Connecticut' THEN 'CT'
WHEN 'Delaware' THEN 'DE'
WHEN 'District of Columbia' THEN 'DC'
WHEN 'Florida' THEN 'FL'
WHEN 'Georgia' THEN 'GA'
WHEN 'Hawaii' THEN 'HI'
WHEN 'Idaho' THEN 'ID'
WHEN 'Illinois' THEN 'IL'
WHEN 'Indiana' THEN 'IN'
WHEN 'Iowa' THEN 'IA'
WHEN 'Kansas' THEN 'KS'
WHEN 'Kentucky' THEN 'KY'
WHEN 'Louisiana' THEN 'LA'
WHEN 'Maine' THEN 'ME'
WHEN 'Maryland' THEN 'MD'
WHEN 'Massachusetts' THEN 'MA'
WHEN 'Michigan' THEN 'MI'
WHEN 'Minnesota' THEN 'MN'
WHEN 'Mississippi' THEN 'MS'
WHEN 'Missouri' THEN 'MO'
WHEN 'Montana' THEN 'MT'
WHEN 'Nebraska' THEN 'NE'
WHEN 'Nevada' THEN 'NV'
WHEN 'New Hampshire' THEN 'NH'
WHEN 'New Jersey' THEN 'NJ'
WHEN 'New Mexico' THEN 'NM'
WHEN 'New York' THEN 'NY'
WHEN 'North Carolina' THEN 'NC'
WHEN 'North Dakota' THEN 'ND'
WHEN 'Ohio' THEN 'OH'
WHEN 'Oklahoma' THEN 'OK'
WHEN 'Oregon' THEN 'OR'
WHEN 'Pennsylvania' THEN 'PA'
WHEN 'Rhode Island' THEN 'RI'
WHEN 'South Carolina' THEN 'SC'
WHEN 'South Dakota' THEN 'SD'
WHEN 'Tennessee' THEN 'TN'
WHEN 'Texas' THEN 'TX'
WHEN 'Utah' THEN 'UT'
WHEN 'Vermont' THEN 'VT'
WHEN 'Virginia' THEN 'VA'
WHEN 'Washington' THEN 'WA'
WHEN 'West Virginia' THEN 'WV'
WHEN 'Wisconsin' THEN 'WI'
WHEN 'Wyoming' THEN 'WY'
WHEN 'Alberta' THEN 'AB'
WHEN 'British Columbia' THEN 'BC'
WHEN 'Manitoba' THEN 'MB'
WHEN 'New Brunswick' THEN 'NB'
WHEN 'Newfoundland and Labrador' THEN 'NL'
WHEN 'Northwest Territories' THEN 'NT'
WHEN 'Nova Scotia' THEN 'NS'
WHEN 'Nunavut' THEN 'NU'
WHEN 'Ontario' THEN 'ON'
WHEN 'Prince Edward Island' THEN 'PE'
WHEN 'Quebec' THEN 'QC'
WHEN 'Saskatchewan' THEN 'SK'
WHEN 'Yukon Territory' THEN 'YT'
ELSE NULL
END
Though the below code will work, it will be better if you have another column in the country table with abbreviations
select
case
When o.ShipCountry = 'UnitedState' Then 'US'
When o.ShipCountry = 'Canada' Then 'CA'
ELSE o.ShipCountry
End
Try this,
SELECT o.CustomerID, null emptyColumn, o.ShipFirstName, o.ShipCountry =
CASE WHEN oShipCountry ='United States' THEN 'US'
WHEN o.ShipCountry = 'Canada' then 'CA' END,
c.EmailAddress
FROM Orders o, Customers c
WHERE o.CustomerID = c.CustomerID