# SELECT JOIN Syntax
#### 常用语法
table_references:
```
table_reference [, table_reference] ...
```
table_reference:
```
table_factor | join_table
```
table_factor:
```
tbl_name [[AS] alias]
| table_subquery [AS] alias
| ( table_references )
```
join_table:
```
table_reference [INNER | CROSS] JOIN table_factor [join_condition]
| table_reference {LEFT|RIGHT} [OUTER] JOIN table_reference join_condition
| table_reference [{LEFT|RIGHT} [OUTER]] JOIN table_factor
```
join_condition:
```
ON conditional_expr
| USING (column_list)
```
#### 语法限制
不支持SELECT STRAIGHT_JOIN。
不支持NATURAL JOIN。
#### 示例
```
select id,name from test1 where id=1;
select distinct id,name from test1 where id>=1;
select id,name from test1 order by id limit 2 offset 2;
select id,name from test1 order by id limit 2,2;
select  1+1,'test',id,id*1.1,now() from test1 limit 3;
select  current_date,current_timestamp;
select abs(sum(id)) from test1;
```