Interested to Buy Any Domain ? << Click Here >> for more details...
plz explain parlla distribution and subtable concept in teradata
- 3 Answers
- 9655 Views
- TCS, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / karthik
parlla distribution:
This is the key concept of Teradata storing data in parallel, as it uses PI to store data, data is is stored parallel across the AMP's available.
Sub table: This table is created when a Unique secondary Index is created on the table, it will have rowid,data and hash value for the data. It is used to fetch the data using secondary index.
| Is This Answer Correct ? | 10 Yes | 0 No |
Answer / yuvaevergreen
Parallel distribution: TD stores the data uniformly. Ideally, every amp should have equal no of rows from each table in vdisks.Based on the primary index, the distribution of data would be uniform on amps.
Sub table: It is used for secondary indexes and stored in amp(s).
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / tdguy
Parallel distribution - Due to "shared nothing"
architecture, TD distributes and fetches the data in
parallel. Mainly because of AMP,PE and BYNET.
Subtables - These are created and used by TD, when the
secondary indexes come into picture.
| Is This Answer Correct ? | 3 Yes | 0 No |
How you will check the version of teradata?
What is the difference between union and union all in teradata?
What is inner join and outer join?
wt r before journal& after journel.....in teradata
What is the opening step in basic teradata query script?
Hello Frndz, I have a table named product as shown below: product_id product_name 1 AAA 1 BBB 1 CCC 2 PPP 2 QQQ 2 RRR Now my output should be: product_id product_name_1 product_name_2 product_name_3 1 AAA BBB CCC 2 PPP QQQ RRR
What is SQL Assistence?please eample
Why Fload doesn’t support multiset table?
What is the purpose of using case expression in teradata?
why varchar takes 2 extra bytes?
How do you define Teradata?
Difference between inner join and outer join?
Teradata 
