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mysql各種復(fù)雜的查詢語句匯總

黃文隆1年前9瀏覽0評論

MySQL是一種開源的關(guān)系型數(shù)據(jù)庫管理系統(tǒng),具有高效、可靠、兼容性強(qiáng)等優(yōu)點(diǎn),是Web開發(fā)中常用的數(shù)據(jù)庫之一。在實(shí)際的開發(fā)過程中,針對不同的查詢需求,我們需要使用各種復(fù)雜的查詢語句來獲取所需的數(shù)據(jù)。接下來,我們來看看一些常見的MySQL復(fù)雜查詢語句。

SELECT DISTINCT column_name                -- 返回指定列不同的值
FROM table_name;
SELECT column_name                        -- 返回指定列的值,并按指定列排序
FROM table_name
ORDER BY column_name ASC/DESC;
SELECT column_name1, column_name2         -- 返回指定列的值,并按指定列排序
FROM table_name
ORDER BY column_name1 ASC/DESC, column_name2 DESC/ASC;
SELECT column_name                        -- 返回指定列的值,并進(jìn)行分組
FROM table_name
GROUP BY column_name;
SELECT column_name, COUNT(column_name)    -- 返回指定列的值及其出現(xiàn)次數(shù)
FROM table_name
GROUP BY column_name;
SELECT column_name                        -- 返回指定列的值,并按條件篩選
FROM table_name
WHERE condition;
SELECT column_name                        -- 返回指定列的值,并按多個(gè)條件篩選
FROM table_name
WHERE condition1 AND/OR condition2;
SELECT column_name                        -- 返回指定列的值,并按指定范圍篩選
FROM table_name
WHERE column_name BETWEEN value1 AND value2;
SELECT column_name                        -- 返回指定列的值,并按指定范圍外的值篩選
FROM table_name
WHERE column_name NOT BETWEEN value1 AND value2;
SELECT column_name                        -- 返回指定列的值,并根據(jù)列的值進(jìn)行匹配篩選
FROM table_name
WHERE column_name LIKE 'pattern';
SELECT column_name                        -- 返回指定列的值,并根據(jù)列的值進(jìn)行匹配篩選(通配符匹配)
FROM table_name
WHERE column_name LIKE '[abc]%';
SELECT column_name                        -- 返回指定列的值,并根據(jù)列的值進(jìn)行匹配篩選(正則表達(dá)式匹配)
FROM table_name
WHERE column_name REGEXP 'pattern';
SELECT column_name                        -- 返回指定列的值,并根據(jù)指定值進(jìn)行連接
FROM table_name
JOIN table1_name
ON table_name.column_name = table1_name.column_name;
SELECT column_name                        -- 返回指定列的值,并對結(jié)果進(jìn)行分頁
FROM table_name
LIMIT value OFFSET value;
SELECT column_name1, column_name2         -- 返回指定列的值,并對結(jié)果進(jìn)行分組和分頁
FROM table_name
GROUP BY column_name1
ORDER BY column_name2 DESC/ASC
LIMIT value OFFSET value;

上述查詢語句只是MySQL復(fù)雜查詢語句中的一部分,還有各種高級查詢、子查詢、聯(lián)合查詢等,需要在具體的開發(fā)情境中靈活運(yùn)用。希望本文能對大家在MySQL數(shù)據(jù)庫操作中有所幫助。