NCSqlJoin (Apache NLPCraft 0.9.0)

```
public interface NCSqlJoin
```
Object presentation of SQL join (foreign key).
In JSON/YAML generated model SQL joins are declared with the following data model metadata (example):
```
   sql:joins:
   - fromtable: "orders"
     fromcolumns:
     - "customer_id"
     totable: "customers"
     tocolumns:
     - "customer_id"
     jointype: "left"
 
```
See Also:

NCSqlSchemaBuilder.makeSchema(NCModel), NCSqlSchema.getJoins()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`List<String>`	`getFromColumns()`	Gets the list of columns in originating table.
`String`	`getFromTable()`	Gets the name of the originating table.
`List<String>`	`getToColumns()`	Gets the list of columns in target table.
`String`	`getToTable()`	Gets the name of the target table.
`NCSqlJoinType`	`getType()`	Gets type of the join.

- Method Detail
  - getFromTable
```
String getFromTable()
```
    Gets the name of the originating table.
    
    Returns:
    
    Name of the originating table.
  - getToTable
```
String getToTable()
```
    Gets the name of the target table.
    
    Returns:
    
    Name of the target table.
  - getFromColumns
```
List<String> getFromColumns()
```
    Gets the list of columns in originating table.
    
    Returns:
    
    List of columns in originating table.
  - getToColumns
```
List<String> getToColumns()
```
    Gets the list of columns in target table.
    
    Returns:
    
    List of columns in target table.
  - getType
```
NCSqlJoinType getType()
```
    Gets type of the join.
    
    Returns:
    
    Type of join.