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```
#!/usr/bin/perl -w

...
}

exit;
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-bash-4.1$ ./bbtest 
update [UPDATE test  SET  name=?,  age=?, WHERE course_id=? AND year=2
+018]
binds -->  {"Boop, Betty", 33, 7749 }
DBD::mysql::st execute failed: called with 4 bind variables when 3 are
+ needed at ./bbtest line 36.