Select APIs

	function distinct(): self;
 
    function columns(...$columns): self;
 
    function alias(string $name): self;
 
    function from(string $table_name): self;
 
    function join($table_name, string $col1 = null, string $col2 = null): self;
 
    function innerJoin($table_name, string $col1 = null, string $col2 = null): self;
 
    function leftJoin($table_name, string $col1 = null, string $col2 = null): self;
 
    function rightJoin($table_name, string $col1 = null, string $col2 = null): self;
 
    function where($column, ?string $operator = null, $value = null): self;
 
    function andWhere(string $column, ?string $operator, $value): self;
 
    function orWhere(string $column, ?string $operator, $value): self;
 
    function whereNot(string $column, ?string $operator, $value): self;
 
    function andNot(string $column, ?string $operator, $value): self;
 
    function whereIn(string $column, ...$value): self;
 
    function orderBy($column, string $sort): self;
 
    function groupBy($column): self;
 
    function limit(int $count): self;
 
    function offset(int $count): self;
 
    function count(string $column, string $alias = ''): self;
 
    function raw(string $sql): self;
 
    function getSql();
 
    function get();