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それは簡単な質問です。
私がすでにしたこと:
sql.delete(TBL_ITEMS, KEY_TOTAL_AMOUNT + "=" + "", null);
また
sql.delete(TBL_ITEMS, KEY_TOTAL_AMOUNT + "=" + null, null);
他に方法はありますか?
さて、あなたはそれを試してみることができます:
sql.delete(TBL_ITEMS, KEY_TOTAL_AMOUNT + " IS NULL", null);