sql - mysql, use two select -


मुझे त्रुटि क्यों मिलती है: उपकुंजी 1 से अधिक पंक्ति देता है 

  SELECT name, cat_id, (विषय का चयन करें श्रेणी WHERE बिल्ली = u.cat_id) नाम से नाम से

धन्यवाद

मुझे शायद एक मूर्ख जवाब मिल गया है लेकिन आप एक सम्मिलन का उपयोग क्यों नहीं कर रहे हैं? 

  का चयन नाम.cat_id, name.name, category.topic नाम से INNER जुड़ें श्रेणी पर श्रेणी.cat = name.cat_id

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