sql - Select statement using WHERE x IN (SELECT ...) -

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मेरे पास दो टेबल हैं: 

  [product_to_category --------- ------------ product_id category_id [श्रेणी --------------------- category_id parent_id

मुझे सभी product_id को '39' के एक श्रेणी.parent_id के साथ मिलना होगा। यह है जो मैं कोशिश कर रहा हूं, लेकिन कम से कम कुछ सौ हैं जब वह खाली हो रहा है: 

  SELECT Product_id product_to_category से WHERE श्रेणी_आईडी में (से parent_id चुनें श्रेणी WHERE parent_id = '39') < / Code>

क्या मैं यहाँ संभव करने की कोशिश कर रहा हूं?

इसे मिला:

SELECT product_id से product_to_category INNER श्रेणी में शामिल हों product_to_category.category_id = श्रेणी.category_id और श्रेणी.parent_id = 39


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