List of checks to incorporate

This is a dumping ground of errors that I've encountered in SQL that we should add checks for.

### (ALL) - trailing whitespace

### (ALL) - Unquoted string

`INSERT INTO person (name) VALUES (Tim);`

Tim should be 'Tim'

### (UPDATE) - Update without a WHERE

Same as the DELETE without a WHERE. Move the `delete/missingWhere` check into the `generic` directory and have it apply to the update method as well.

### (ALL) - Wrong ordering of statement

Sometimes you put the `WHERE`, `LIMIT` or `ORDER BY` in the wrong order. We need a check to guard against this.

i.e.

```
SELECT * FROM api_response ORDER BY `id` DESC WHERE request_type = 'store';
```

Should be
```
SELECT * FROM api_response WHERE request_type = 'store' ORDER BY `id` DESC;
```

### (ALL) - Invalid data type

You can't assign a string to an integer for example

i.e. (assuming age is an `integer` type)
```
INSERT INTO person(age) VALUES ("test");
```

It should complain that we're trying to insert a non-numeric value in its place.

### (ALL) - lower cased reserved word

Things like `SELECT` and `UPDATE` should be uppercased and we should be shouted at for not following this.

### Incorrect foreign key data type

If you're making foreign keys in a `CREATE TABLE` statement, the data types of the foreign keys (as well as the length of the data type) must match. Write a check to guard against this.

### (DECLARE) - Permitted only within BEGIN...END block

DECLARE is permitted only inside a BEGIN ... END compound statement and must be at its start, before any other statements.

### (DECLARE) - Declarations must follow a certain order

Declarations must follow a certain order. Cursor declarations must appear before handler declarations. Variable and condition declarations must appear before cursor or handler declarations.