How can I persist query results in Teradata database?

1 year ago
Emily Johnson
1 minute

In Teradata database, you can use the following methods to fix query results:

  1. Add the WITH NO RECURSIVE clause in the query statement to prevent duplicate results in recursive queries.

“我会努力工作来实现我的梦想。”
“I will work hard to achieve my dreams.”

WITH NO RECURSIVE query_name AS (
    -- 查询语句
)
SELECT * FROM query_name;
  1. Using the DISTINCT keyword: Adding the DISTINCT keyword in a query statement helps to eliminate duplicate results.

For example:

SELECT DISTINCT column_name FROM table_name;
  1. With the QUALIFY clause, you can filter results based on specified conditions, returning only rows that meet the criteria.

“For example”

SELECT * FROM table_name
QUALIFY condition;
  1. By using the GROUP BY clause, you can group the results by a specified column to eliminate duplicate rows.

For example:

SELECT column1, column2, ... FROM table_name
GROUP BY column1, column2, ...;
  1. When using the UNION operator, you can combine the results of multiple tables or queries together, while also removing any duplicate rows.

For example:

SELECT column1, column2, ... FROM table1
UNION
SELECT column1, column2, ... FROM table2;

By using the above methods, you can secure the query results of Teradata database to ensure their accuracy and consistency.

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