Mybatis中模糊查询的各种写法

1. sql中字符串拼接

SELECT * FROM tableName WHERE name LIKE CONCAT(CONCAT(‘%‘, #{text}), ‘%‘);

2. 使用 ${...} 代替 #{...}

SELECT * FROM tableName WHERE name LIKE ‘%${text}%‘;

3. 程序中拼接

Java

// String searchText = "%" + text + "%";

String searchText = new StringBuilder("%").append(text).append("%").toString();

parameterMap.put("text", searchText);

SqlMap.xml

SELECT * FROM tableName WHERE name LIKE #{text};

4. 大小写匹配查询

SELECT *  FROM TABLENAME  WHERE UPPER(SUBSYSTEM) LIKE ‘%‘ || UPPER(‘jz‘) || ‘%‘ 或者

SELECT *   FROM TABLENAME  WHERE LOWER(SUBSYSTEM) LIKE ‘%‘ || LOWER(‘jz‘) || ‘%‘