INSERT INTO index_data (index_name, date, index_value, change_rate,
stock_name, stock_price, turnover_rate, create_time, source)
VALUES (#{indexName}, #{date}, #{indexValue}, #{changeRate},
#{stockName}, #{stockPrice}, #{turnoverRate}, CURRENT_TIMESTAMP, #{source})
INSERT INTO index_data (index_name, date, index_value, change_rate,
stock_name, stock_price, turnover_rate, create_time, source)
VALUES
(#{item.indexName}, #{item.date}, #{item.indexValue}, #{item.changeRate},
#{item.stockName}, #{item.stockPrice}, #{item.turnoverRate}, CURRENT_TIMESTAMP, #{item.source})
DELETE FROM index_data