pub struct SelectStatement {
    pub distinct: bool,
    pub columns: Vec<SelectColumn>,
    pub from: Option<TableRef>,
    pub where_clause: Option<Expr>,
    pub group_by: Vec<Expr>,
    pub having: Option<Expr>,
    pub order_by: Vec<OrderBy>,
    pub limit: Option<Expr>,
    pub offset: Option<Expr>,
}

Whether to select DISTINCT values.

The columns to select.

The FROM clause.

The WHERE clause.

GROUP BY expressions.

HAVING clause.

ORDER BY clauses.

LIMIT clause.

OFFSET clause.