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Use Excel to be 10 times better with these 9 formulas.

2025/9/19 Edited to

... Read moreนอกจาก 9 สูตรพื้นฐานที่ช่วยให้ทำงานไวขึ้น (SUM, AVERAGE, MAX, MIN, COUNT, COUNTIF, SUMIF, TODAY, BAHTTEXT) เรามาเติมของที่คนค้นหาบ่อยแต่กดเข้าอ่านน้อย ให้ใช้ได้จริงในงานประจำวันกันค่ะ 1) SUMIFS ใช้ยังไง (รวมยอด “หลายเงื่อนไข”) ถ้า SUMIF คือ 1 เงื่อนไข, SUMIFS คือหลายเงื่อนไข เหมาะมากกับสรุปยอดขาย/ค่าใช้จ่าย โครงสร้าง: =SUMIFS(ช่วงผลรวม, ช่วงเงื่อนไข1, เงื่อนไข1, ช่วงเงื่อนไข2, เงื่อนไข2, ...) ตัวอย่าง: ต้องการรวมยอดขายของ “สินค้า A” เฉพาะ “สาขา B” =SUMIFS(C2:C100, A2:A100,"สินค้า A", B2:B100,"สาขา B") ทริค: ถ้าเงื่อนไขเป็นวันที่ ให้ทำคู่ว่า ">=" และ "<=" เช่นรวมยอดเดือนนี้ 2) สูตร VAT 7% ใน Excel (คิดภาษีแบบที่ใช้จริง) - ราคายังไม่รวม VAT → หายอด VAT: =A2*7% - ราคายังไม่รวม VAT → ราคารวม VAT: =A2*(1+7%) - ราคา “รวม VAT แล้ว” → หา VAT ที่รวมอยู่: =A2*7/107 - ราคา “รวม VAT แล้ว” → หาราคาก่อน VAT: =A2*100/107 ถ้าออกเอกสารและอยากแปลงเป็นตัวอักษร ใช้ =BAHTTEXT(เซลล์) 3) วิธีพิมพ์เศษ 1/2 ใน Excel ไม่ให้กลายเป็นวันที่ อันนี้เจอบ่อยมาก พิมพ์ 1/2 แล้ว Excel ชอบตีเป็น 1 ก.พ. วิธีแก้ที่ใช้ได้: - ใส่ 0 นำหน้า: พิมพ์ 0 1/2 แล้วกด Enter (จะได้ 1/2) - หรือเปลี่ยนรูปแบบเซลล์เป็น Fraction: คลิกขวา Format Cells > Fraction - หรือถ้าต้องการให้เป็น “ข้อความ” ให้พิมพ์ '1/2 (มีเครื่องหมาย ' นำหน้า) 4) ตัวอย่างตาราง Excel (เอาไปลองทำตามได้ทันที) ลองทำตารางง่าย ๆ แบบนี้: คอลัมน์ A: วันที่ | B: สินค้า | C: สาขา | D: จำนวน | E: ยอดขาย จากนั้นลอง: - หายอดขายรวม: =SUM(E:E) - หาเฉลี่ยยอดขาย: =AVERAGE(E:E) - นับจำนวนรายการที่ยอดขาย=200: =COUNTIF(E:E,"=200") - รวมยอดขายสินค้า A: =SUMIF(B:B,"สินค้า A",E:E) - รวมยอดขายสินค้า A ที่สาขา B: =SUMIFS(E:E,B:B,"สินค้า A",C:C,"สาขา B") 5) แบบทดสอบ Excel เบื้องต้น (เช็กตัวเอง 5 ข้อ) (1) SUMIF ต่างจาก SUMIFS ยังไง? (2) ทำไมพิมพ์ 1/2 แล้วกลายเป็นวันที่ และแก้แบบไหนเร็วสุด? (3) สูตรหา VAT จาก “ราคารวม” คืออะไร? (4) COUNT กับ COUNTIF ใช้ต่างกันยังไง? (5) ถ้าจะสรุปยอดตามเงื่อนไข 2 อย่าง ควรใช้สูตรไหน? ถ้าคุณทำงานบัญชี/ขาย/ธุรการ แนะนำให้เซฟสูตรพวกนี้ไว้เลย วันไหนทำรายงานยอดขายหรือสรุปภาษีจะประหยัดเวลาได้เยอะมากค่ะ

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