Oracle的SIGN函數用于返回一個數字的符號
以下是如何結合其他函數使用Oracle的SIGN函數的示例：
SELECT a.value, b.value,
CASE WHEN SIGN(a.value - b.value) = 1 THEN 'a大于b'
WHEN SIGN(a.value - b.value) = -1 THEN 'a小于b'
ELSE 'a等于b'
END AS comparison_result
FROM your_table a, your_table b
WHERE a.id = 1 AND b.id = 2;
SELECT *
FROM your_table
ORDER BY SIGN(your_field);
SELECT SUM(CASE WHEN transaction_type = 'income' THEN amount ELSE -amount END) AS total_income,
SUM(CASE WHEN transaction_type = 'expense' THEN amount ELSE -amount END) AS total_expense,
SIGN(SUM(CASE WHEN transaction_type = 'income' THEN amount ELSE -amount END) -
SUM(CASE WHEN transaction_type = 'expense' THEN amount ELSE -amount END)) AS income_vs_expense
FROM your_table;
這些示例展示了如何在Oracle SQL查詢中結合其他函數使用SIGN函數。你可以根據實際需求調整這些示例以滿足你的需求。
