Hello,

A couple of questions on the tutorial:

1) Why .all() in 3rd (and some others) "query" code box, but not
others?

2) Filter clause:  Why  '==' vs. '=' used in .filter() vs. .filter_by
()

3) Common Filter Operators: Why or_(), and_(), in_(), but like().
(instead of like_() )

4) Common Filter Operators: Is '!= None' the correct way to get a "NOT
NULL"? (Not mentioned in tutorial)

5) Common Filter Operators: Using User.name.match raised an
"(OperationalError) unable to use function MATCH in the requested
context"... why?  (using sqlite:memory is per tutorial)


Thank you

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