一、表字段修復：
SELECT TABLE_SCHEMA '數據庫',TABLE_NAME '表',COLUMN_NAME '字段',CHARACTER_SET_NAME '原字符集',COLLATION_NAME '原排序規則',CONCAT('ALTER TABLE ', TABLE_SCHEMA,'.',TABLE_NAME, ' MODIFY COLUMN ',COLUMN_NAME,' ',COLUMN_TYPE,' CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;') '修正SQL'
FROM information_schema.`COLUMNS`
WHERE COLLATION_NAME RLIKE 'latin1';
latin1 是我demo的模糊匹配排序規則，這里需要替換為你數據庫中需要替換的字段的排序規則，utf8mb4設置的是替換的字符集，utf8mb4_general_ci設置的是替換的排序規則，可以換為需要修正為什么標準，下面是SQL跑出來的樣例。
image.png
把修正的SQL復制出來運行，字段標準就修復了。
ALTER TABLE scm_users.users MODIFY COLUMN password varchar(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN address varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN country varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN postal_code varchar(6) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN contact_person varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN contact_no varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN mobile varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN email varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.contact MODIFY COLUMN remark text CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.warehouse MODIFY COLUMN warehouse_no varchar(6) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.warehouse MODIFY COLUMN name varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.warehouse_category MODIFY COLUMN name varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.warehouse_op_hours MODIFY COLUMN start_time varchar(5) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
ALTER TABLE scm_warehouse.warehouse_op_hours MODIFY COLUMN end_time varchar(5) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
二、表修復：
改變表
SELECT TABLE_SCHEMA '數據庫',TABLE_NAME '表',TABLE_COLLATION '原排序規則',CONCAT('ALTER TABLE ',TABLE_SCHEMA,'.', TABLE_NAME, ' COLLATE=utf8mb4_general_ci;') '修正SQL'
FROM information_schema.`TABLES`
WHERE TABLE_COLLATION RLIKE 'latin1';
表修復只需要設置排序規則，字符集會自動設置到正確的標準，替換的話，跟上面一樣，下面是SQL跑出來的樣例。
image.png
把SQL復制出來運行，表就會修復了
三、 數據庫修復：
#修改數據庫
SELECT SCHEMA_NAME '數據庫',DEFAULT_CHARACTER_SET_NAME '原字符集',DEFAULT_COLLATION_NAME '原排序規則',CONCAT('ALTER DATABASE ',SCHEMA_NAME,' CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;') '修正SQL'
FROM information_schema.`SCHEMATA`
WHERE DEFAULT_CHARACTER_SET_NAME RLIKE 'utf8';
