src/main/resources/mybatis/mapper/CollegeMapper.xml

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<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.registrationmanagementsystem.mapper.CollegeMapper">
    <insert id="addCollege">
        insert into college (name, generalSituation, banner)
        values (#{name},#{generalSituation},#{banner});
    </insert>
    <update id="updateCollege">
        update college
        set name = #{name},
            generalSituation = #{generalSituation},
            banner = #{banner}
        where id = #{id};
    </update>
    <delete id="deleteCollege">
        delete
        from college
        where id = #{id};
    </delete>

    <select id="queryCollegeList" resultType="com.example.registrationmanagementsystem.entity.College">
        select *
        from college;
    </select>
    <select id="queryCollegeById" resultType="com.example.registrationmanagementsystem.entity.College">
        select *
        from college c
        where c.id = #{id};
    </select>

</mapper>