从另一个表更新行

I have a table with 2 columns, Country and Qty. the field country has distinct acronyms of all the countries. Now my job is to replace those acronyms with the actual country name. Now there is another table with acronyms and corresponding country names. I have to take the values from this second table and update the first one where Acronyms match. Please help..

tsql

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最佳答案

UPDATE  q
SET     country = a.country
FROM    quantity q
JOIN    acronym a
ON      a.acronym = q.country