tJoin
New
Run a left, right outer or inner join on the provided data tables.
Syntax
expression.tJoin(nType, leftTable, rightTable, Columns, matchKeys, [predicate= vbNullString], [headers=True])
Parameters
| Part | Description |
|---|---|
| nType | Required. Identifier specifying a JoinType enumeration variable representing the join nature. |
| leftTable | Required. Identifier specifying a CSVArrayList Type object. Represents the first table in the join operation. |
| rightTable | Required. Identifier specifying a CSVArrayList Type object. Represents the second table in the join operation. |
| Columns | Required. Identifier specifying a String Type variable. Specifies the structure of the rows returned. |
| matchKeys | Required. Identifier specifying a String Type variable. Represents the primary and preference keys to be matched. |
| predicate | Required. Identifier specifying a String Type variable. Represents the condition that must be met when selecting rows. |
| headers | Required. Identifier specifying a Boolean Type variable. Indicates if the tables have headers. |
Returns value
Type: CSVArrayList
- See also
- Filter method.
Behavior
Use a string such as “{1-2,5,ID};{1-6}” as a predicate of the columns to indicate the join of columns 1 to 2, 5 and ‘ID’ of leftTable with the columns 1 to 6 of rightTable. Use a string such as “{*};{1-3}” to indicate the union of ALL columns of leftTable with columns 1 to 3 of rightTable. The predicate must use the dot syntax [t1.#][t1.fieldName] to indicate the fields of the table, where t1 refers to the leftTable. The matchKeys predicate must be given as “#/$;#/$”.
☕Example
Sub Join(ByRef lTable As CSVArrayList, ByRef rTable As CSVArrayList)
Dim CSVint As CSVinterface
Set CSVint = New CSVinterface
With CSVint
' Performs a Left join returning the "1st" and "Country" fields of the left table and the
' "Total_Revenue" field of the right table, joined in the "Order_ID" field of both tables,
' of those records that satisfy the given condition.
.tJoin JoinType.JT_LeftJoin _
lTable, rTable, _
"{1,Country};{Total_Revenue}", _
"Order_ID;Order_ID", _
"t2.Total_Revenue>3000000 & t1.Region='Central America and the Caribbean'"
End With
Set CSVint = Nothing
End Sub