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SQL Server Scripting - Iterate through a number of records and then alter another table

Greetings,
I am working on an SQL Server script to automate a data cleansing routine as follows:
I need to select records in table ABC(20 rows returned)

For each record(20) that is returned I need to take a value from one of the columns in ABC(Ex: ABC.MY_COLUMN) and then use it to make an update in table XYZ (Ex: XYZ.MY_COLUMN). In other words I need to take the value from ABC.MY_COULMN and update the XYZ table with that value.

Many Thanks

Patrick Matthews

Assuming there is a field you can join the two tables on, use UPDATE. For example:

UPDATE XYZ
SET MY_COLUMN = a.MY_COLUMN
FROM XYZ x INNER JOIN
    ABC a ON x.ID = a.ID
WHERE a.MY_DATE >= '2014-07-01'

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Russell Fox

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PortletPaul

:) yep, change of thinking from loops/iterations to thinking joins seems needed.
tongue-in-cheek "translation" follows:

I am working on an SQL Server script
I am working on a query

to automate a data cleansing routine as follows:
to facilitate data cleansing

I need to select records in table ABC(20 rows returned)
I need a where clause or subquery to select from table ABC(n rows in resultset)

For each record(20) that is returned
For each match of these rows to another table; XYZ

I need to take a value from one of the columns in ABC(Ex: ABC.MY_COLUMN) and then use it to make an update in table XYZ (Ex: XYZ.MY_COLUMN).
I need to update a column of XYZ

In other words I need to take the value from ABC.MY_COLUMN and update the XYZ table with that value.
In short I need an update query

In the unlikely event: no points please