014——Mybatis中模糊查询的各种写法

模糊查询：
工作中用到，写三种用法吧，第四种为大小写匹配查询
 
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
   // or 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
[sql] view plaincopy
SELECT *  FROM TABLENAME  WHERE UPPER(SUBSYSTEM) LIKE '%' || UPPER('jz') || '%'  
 --或者是  
SELECT *   FROM TABLENAME  WHERE LOWER(SUBSYSTEM) LIKE '%' || LOWER('jz') || '%'