show table status from oa
SELECT
TABLE_SCHEMA '数据库',
TABLE_NAME '表',
COLUMN_NAME '字段',
CHARACTER_SET_NAME '原字符集',
COLLATION_NAME '原排序规则',
CONCAT( 'ALTER TABLE ', TABLE_SCHEMA, '.', TABLE_NAME, ' MODIFY COLUMN ', COLUMN_NAME, ' ', COLUMN_TYPE, ' CHARACTER SET utf8 COLLATE utf8_general_ci;' ) '修正SQL'
FROM
information_schema.`COLUMNS`
WHERE
TABLE_SCHEMA='oa'
解决方案: 让关联表的字符编码一致
1.修改表中所有字符编码
ALTER TABLE nms_blacklist CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
2…修改表的字符编码
ALTER TABLE 表名 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
此接口的
ON 后面加上 COLLATE utf8mb4_general_ci
解决方案实际应用
LEFT JOIN ( SELECT * FROM ( SELECT * FROM biz_task_queue ORDER BY create_date DESC LIMIT 10000 ) a GROUP BY relevance
)
