T.C

T

An attached table

C

A column of the attached table

A

1

=create(k1,v1).record([1,10,2,20,3,30,4,40,10,100])

Create a table sequence:

2

=create(k1,k2,v2).record([1,1,"a",2,4,"c",2,8,"b"])

Create a table sequence:

3

=file("D:/ckv.ctx")

4

=A3.create(#k1,v1)

Create the composite table’s base table.

5

=A4.attach(table2,#k2,v2)

Add an attached table to the base table.

6

=A4.append(A1.cursor())

Append data to the base table.

7

=A5.append(A2.cursor())

Append data to the attached table.

8

=A4.cursor(k1,v1,table2.k2,table2.v2).fetch()

Retrieve columns k1 and v1 from the composite table’s base table, and columns k2 and v2 from attached table table2; record values of k2 and v2 as empty if a record doesn’t have the two fields. Get the first record if there are multiple records in the attached table that correspond to one value.