MySQL :: MySQL 8.4 參考手冊 :: 12.8.1 在 SQL 陳述式中使用 COLLATE

版本 8.4

8.0 日語

MySQL 8.4 參考手冊 / ... / 在 SQL 陳述式中使用 COLLATE

使用 COLLATE 子句，您可以覆寫比較的預設校對。COLLATE 可用於 SQL 陳述式的各個部分。以下是一些範例

搭配 ORDER BY

SELECT k
FROM t1
ORDER BY k COLLATE latin1_german2_ci;

搭配 AS

SELECT k COLLATE latin1_german2_ci AS k1
FROM t1
ORDER BY k1;

搭配 GROUP BY

SELECT k
FROM t1
GROUP BY k COLLATE latin1_german2_ci;

搭配彙總函數

SELECT MAX(k COLLATE latin1_german2_ci)
FROM t1;

搭配 DISTINCT

SELECT DISTINCT k COLLATE latin1_german2_ci
FROM t1;

搭配 WHERE

SELECT *
FROM t1
WHERE _latin1 'Müller' COLLATE latin1_german2_ci = k;

SELECT *
FROM t1
WHERE k LIKE _latin1 'Müller' COLLATE latin1_german2_ci;

搭配 HAVING

SELECT k
FROM t1
GROUP BY k
HAVING k = _latin1 'Müller' COLLATE latin1_german2_ci;