MySQL是一個(gè)廣泛使用的關(guān)系型數(shù)據(jù)庫管理系統(tǒng)，提供了多種合并匯總函數(shù)用于數(shù)據(jù)分析和統(tǒng)計(jì)。這些函數(shù)可以對數(shù)據(jù)進(jìn)行跨行或跨列的計(jì)算，一般用于生成數(shù)據(jù)報(bào)表、圖表或指標(biāo)分析。

-- SUM函數(shù)用于計(jì)算某列的和
SELECT SUM(column_name) FROM table_name;
-- AVG函數(shù)用于計(jì)算某列的平均值
SELECT AVG(column_name) FROM table_name;
-- COUNT函數(shù)用于計(jì)算某列的行數(shù)
SELECT COUNT(column_name) FROM table_name;
-- MAX函數(shù)用于計(jì)算某列的最大值
SELECT MAX(column_name) FROM table_name;
-- MIN函數(shù)用于計(jì)算某列的最小值
SELECT MIN(column_name) FROM table_name;
-- GROUP BY子句用于分組計(jì)算
SELECT column_name1, SUM(column_name2) FROM table_name GROUP BY column_name1;
-- HAVING子句用于篩選分組結(jié)果
SELECT column_name1, SUM(column_name2) FROM table_name GROUP BY column_name1 HAVING SUM(column_name2) >100;

使用這些函數(shù)進(jìn)行合并匯總可以節(jié)省人力和時(shí)間，提高數(shù)據(jù)分析的效率和準(zhǔn)確性。