I wish to find all rows in a table where one column is a substring of another column.
In other words, suppose I have a table (called people) with two columns: firstname and lastname, and I want to find all people like "rob robinowitz" and "jill bajillion".
Is there a way to do something like "select * from people where lastname like %firstname%"? (But something which actually works).
You were close
select * from people where lastname like '%' + firstname + '%'
Alternative way (may be even faster)
select * from people where charindex(firstname,lastname)>0
如果您使用的是MySQL,则可以
SELECT * FROM people WHERE INSTR(lastname, firstname) <> 0
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