teradata group_concat

Teradata does not have a built-in function called `GROUP_CONCAT` like some other databases do. However, you can achieve similar functionality by using the `COLLECT` and `ARRAY_AGG` functions in Teradata.

The `COLLECT` function is used to aggregate values into an array. For example, if you have a table with a column called `value`, you can use the `COLLECT` function to aggregate all the values into an array:

SELECT COLLECT(value) AS concatenated_values
FROM your_table;

The `ARRAY_AGG` function is similar to `COLLECT` but works on a set of rows. For example, if you have a table with columns `id` and `value`, you can use `ARRAY_AGG` to group values by `id` and aggregate them into arrays:

SELECT id, ARRAY_AGG(value) AS concatenated_values
FROM your_table
GROUP BY id;

These functions can be useful for concatenating values within a group in Teradata.