dianshang-houduan/src/main/java/com/sztzjy/linkCommerce/mapper/TeachingClassStudentMapper.java

package com.sztzjy.linkCommerce.mapper;

import com.sztzjy.linkCommerce.entity.TeachingClassStudent;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

import java.util.List;

@Mapper
public interface TeachingClassStudentMapper {
    long countByTeachingClassId(String teachingClassId);

    long countByStudentUserIdAndTeachingClassId(@Param("studentUserId") String studentUserId,
                                                @Param("teachingClassId") String teachingClassId);

    int insertSelective(TeachingClassStudent record);

    int deleteByTeachingClassId(String teachingClassId);

    List<TeachingClassStudent> selectByTeachingClassId(String teachingClassId);
}