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# Read all data from table
SELECT * FROM jobs

# Read all data by specific author
SELECT * FROM posts WHERE author = '$author'

# Update data
UPDATE Customers 
SET ContactName='$contact_name', City='$city' 
WHERE CustomerName='$contact_name';

# Delete data
DELETE FROM Customers 
WHERE CustomerId='$customer_id'

# Get a list of every unique city in the column 
SELECT DISTINCT City FROM Customers