I would like to ask for performance of SQL. This is my query:
Select
A.code
,A.name
,(Select
B.price
From B
Where B.card = A.card
And B.quote = A.quote)
,(Select
B.quantity
From B
Where B.card = A.card
And B.quote = A.quote)
From A
Where A.flag = '0'
And A.date = '2016/09/02'
Something like this. Is it good performance query? Is will slow if data will big amount. How should I make query for more good performance?
Sorry for my poor English and thanks in advance
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