How to use composite keys

laxmanqlik — Thu, 10 Nov 2016 05:16:29 GMT

Hi i have requirement that i need to use the composite keys to avoid the synthetic keys,

can anyone let me know how to create and use them,

my requirement is that i have 2 tables like below

Month ID details

Jan 101 x

Feb 102 y

March 103 z

Month ID OP

Jan 101 a

Feb 102 b

March 103 c

Now i want these 2 tables to like below

Month ID details OP

Jan 101 x a

Feb 102 y b

March 103 z c

how can i get it with composite key.

if i use joins it looking like below

Month ID details OP

Jan 101 x -

Feb 102 y -

March 103 z -

Month ID details OP

Jan 101 - a

Feb 102 - b

March 103 - c

please let me know the way

thanks in advance

Re: How to use composite keys

tresB — Thu, 10 Nov 2016 05:35:16 GMT

Try like:

Load

Month,

ID,

details,

Month&ID as CompKey

From Table1;

Join

Load

Month&ID as CompKey,

From Table2;

Drop field CompKey;

Re: How to use composite keys

its_anandrjs — Thu, 10 Nov 2016 05:43:57 GMT

You can do this way also

Simple Join

Tab1:
LOAD * INLINE [
Month, ID, details
Jan, 101, x
Feb, 102, y
March, 103, z
];

Join(Tab1)
LOAD * INLINE [
Month, ID, OP
Jan, 101, a
Feb, 102, b
March, 103, c
];

By Composite Keys

Tab1:
LOAD Month&ID as %Key,Month as Months, ID as User_ID, details;
LOAD * INLINE [
Month, ID, details
Jan, 101, x
Feb, 102, y
March, 103, z
];

Join(Tab1)

LOAD Month&ID as %Key, OP;
LOAD * INLINE [
Month, ID, OP
Jan, 101, a
Feb, 102, b
March, 103, c
];

Regards

Anand

topic Re: How to use composite keys in App Development

How to use composite keys

Re: How to use composite keys

Re: How to use composite keys