– 查询字段的字符集
show full columns from table;
– 将索引字段使用指定字符集进行查询
原句:
SELECT COUNT(*) FROM hcp_pro_exam WHERE hospital in(SELECT alias FROM hci_alias);
改为:
SELECT COUNT(*) FROM hcp_pro_exam WHERE convert(hospital using utf8 ) in(SELECT alias FROM hci_alias);