Posted: Wed Feb 08, 2012 12:43 pm Post subject: Разница между JOIN и EXISTS в SELECT
Здравствуйте!
Помогите, пожалуйста, разобраться: впервые столкнулась с EXISTS в SELECT. Чем отличается SELECT, если скажем, прописать так:
1)SELECT * INTO TABLE name_tab
FROM scarr
WHERE EXISTS ( select *
FROM spfli
WHERE carrid = scarr~carrid ).
2) SELECT * INTO TABLE name_tab
FROM scarr
INNER JOIN spfli scarr~carrid = spfli~carrid.
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