Question

I have the following data in my “Street_Address_1” column:

123 Main Street

Using Postgresql, how would I write a query to update the “Street_Name” column in my Address table? In other words, “Street_Name” is blank and I’d like to populate it with the street name value contained in the “Street_Address_1” column.

From what I can tell, I would want to use the “regexp_matches” string method. Unfortunately, I haven’t had much luck.

NOTE: You can assume that all addresses are in a “StreetNumber StreetName StreetType” format.

Answer 1

Something like…:

UPDATE table
SET Street_Name = substring(Street_Address_1 FROM '^[0-9]+ ([a-zAZ]+) ')

See relevant section from PGSQL 8.3.7 docs, the substring form is detailed shortly after the start of the section.