I have two SQL queries, one that uses the other after getting its result.
SELECT users.data from users WHERE users.data2 = value
SELECT mods.data FROM mods WHERE mods.data2 = (result of previous query)
How would I combine these statements? There are similar questions as such, but I'm new to SQL and don't understand them.
The simplest way to join them is with the IN
operator:
SELECT mods.data FROM mods WHERE mods.data2 IN
(SELECT users.data from users WHERE users.data2 = value)
but there are plenty of others...
For example you could join them:
SELECT mods.data
FROM mods
JOIN users ON mods.data2 = users.data
WHERE users.data2 = value
These may produce different outputs though depending on how your data is structured.
SELECT m.data
FROM mods m
INNER JOIN users u ON m.data2 = u.data
WHERE u.data2 = value
根据确切的RDBMS,您可以使用公共表表达式 (CTE),在最新的MS SQL版本中可用。
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