added all joins to readme.md

readme.md

@@ -122,6 +122,7 @@ TableB.addAttribute("B1", INT, {
 let res = await select([TableA.A1, TableB.B1], innerJoinOn(eq(TableA.A1, Tableb.B1)))
     .query(db);
 ```
+See: [Joins](#joins)
 
 #### Insert:
 ```javascript
@@ -228,6 +229,24 @@ StringModifier:
 
 (v\* = string, number, boolean, null, Modifier, Aggregation, select Query, Attribute)
 
+#### Joins
+
+- `crossJoin(t1, t2, ...)`
+- `naturalJoin(t1, t2, ...)`
+- `leftNaturalJoin(t1, t2, ...)`
+- `rightNaturalJoin(t1, t2, ...)`
+- `fullNaturalJoin(t1, t2, ...)`
+- `innerJoinUsing(t1, t2, a1, a2, ...)`
+- `leftJoinUsing(t1, t2, a1, a2, ...)`
+- `rightJoinUsing(t1, t2, a1, a2, ...)`
+- `fullJoinUsing(t1, t2, a1, a2, ...)`
+- `innerJoinOn(t1, t2, b)`
+- `leftJoinOn(t1, t2, b)`
+- `rightJoinOn(t1, t2, b)`
+- `fullJoinOn(t1, t2, b)`
+
+(t\* = Table or Join; a\* = Attributes; b = Boolean Modifier)
+
 #### Aggregations
 - `count(a)`
 - `sum(a)`