SQL Syntax Considerations

Considerations

• SQL syntax is not case-sensitive, except for table names and field names.
• Backticks are (`) are needed around any table or field name that is one of the SQL Reserved Words.

For example: SELECT * FROM `Order`

Without the backticks, you get an error like this:

Encountered "Order" at line column 15. Was expecting one of (...

That error means the parser found a word it recognized, but didn't find other things it expected before it got to that word.

• When either a table name or a field name is reserved word, and both are used together, then backticks are needed around the combination.

For example: `Order.order_number`

• If you do a query on different tables that have fields with the same name, you should provide column aliases for those fields. (Otherwise, a query for A.phone and B.phone identifies both sets of values as "phone". A column alias like A.phone AS A-phone makes it possible to tell which table a set of values came from.)

Learn more: column_expr