At the very least I'd try to clean up that fuzzy condition on behavior to anticipate any bad or inconsistent data entry.
WHERE UPPER(TRIM(behavior)) = 'NICE'
Depending on the possible values in behavior, adding a wildcard or two might be useful but would need to know more about that field to be certain. Personally I'd rather see if there was a methodology using code values or existing indicators instead of a string, but that's often just wishful thinking.
Edit: Also, why dafuq we doing a select all? What is this, intro to compsci? List out the values you need, ya heathen ;)
Honest question, which ones wouldn't it work with? Most add a semicolon to the end automatically or have libraries and interfaces saved me a million times?
I'm not sure how including a final semicolon can protect against an injection attack. In fact, the "Bobby Tables" attack specifically adds in a semicolon, to be able to start a new command. If inputs are sanitized, or much better, passed as parameters rather than string concatenated, you should be fine - nothing can be injected, regardless of the semicolon. If you concatenate untrusted strings straight into your query, an injection can be crafted to take advantage, with or without a semicolon.
You need semicolons if it is a script with multiple commands to separate them. It is not needed for a single statement, like you would use in most language libraries.