diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/ChapterEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/ChapterEntity.java
index 236f2343..59cbccc7 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/ChapterEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/ChapterEntity.java
@@ -13,16 +13,14 @@ public class ChapterEntity {
     private Long chapterId;
 
     @ManyToOne
-    @JoinColumn(name = "video_id", nullable = false)
+    @JoinColumn(name = "video_id")
     private VideoEntity video;
 
-    @Column(nullable = false)
     private int startTime;
 
-    @Column(nullable = false)
     private int duration;
 
     @OneToOne
-    @JoinColumn(name = "summary_id", nullable = false)
+    @JoinColumn(name = "summary_id")
     private SummaryEntity summary;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/LectureEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/LectureEntity.java
index 01c6f437..46d53975 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/LectureEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/LectureEntity.java
@@ -13,28 +13,21 @@ public class LectureEntity {
     private Long lectureId;
 
     @ManyToOne
-    @JoinColumn(name = "member_id", nullable = false)
+    @JoinColumn(name = "member_id")
     private MemberEntity member;
 
     @ManyToOne
-    @JoinColumn(name = "course_id", nullable = false)
+    @JoinColumn(name = "course_id")
     private CourseEntity course;
 
     //source_id의 경우 두 테이블(video, playlist) 모두 매핑되어야 하는데 이게 불가능해서 따로 연관관계를 설정하지 않았습니다.
-    @Column(nullable = true)
     private Long sourceId;
 
-    @Column(nullable = false)
     private Boolean playlist;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Integer lectureIndex;
 
-    @Column(nullable = false)
-    @ColumnDefault("false")
     private Boolean reviewed;
 
-    @Column(nullable = false)
     private String channel;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistEntity.java
index 23eee81a..128e7c53 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistEntity.java
@@ -6,6 +6,8 @@
 
 import javax.persistence.*;
 import java.sql.Timestamp;
+import java.util.ArrayList;
+import java.util.List;
 
 @Entity
 @Table(name="PLAYLIST")
@@ -15,48 +17,31 @@ public class PlaylistEntity {
     @GeneratedValue(strategy = GenerationType.AUTO)
     private Long playlistId;
 
-    @Column(nullable = false, unique = true)
     private String playlistCode;
 
-    @Column(nullable = false)
     private String channel;
 
-    @Column(nullable = false)
     private String title;
 
-    @Column(nullable = true)
     private Integer duration;
 
-    @Column(nullable = true)
     private String description;
 
-    @Column(nullable = false)
     private Timestamp publishedAt;
 
-    @Column(nullable = false)
     private Integer videoCount;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Integer accumulatedRating;
 
-    @Column(nullable = true)
-    @ColumnDefault("false")
     private Boolean available;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Integer reviewCount;
 
-    @Column(nullable = false)
     private String thumbnail;
 
-    @Column(nullable = false)
     @CreationTimestamp
     @UpdateTimestamp
     private Timestamp updatedAt;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Float averageRating;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistVideoEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistVideoEntity.java
index 6e9ff2eb..f0202b2e 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistVideoEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/PlaylistVideoEntity.java
@@ -11,13 +11,12 @@ public class PlaylistVideoEntity {
     private Long playlistVideoId;
 
     @ManyToOne
-    @JoinColumn(name = "playlist_id", nullable = false)
+    @JoinColumn(name = "playlist_id")
     private PlaylistEntity playlist;
 
     @ManyToOne
-    @JoinColumn(name = "video_id", nullable = false)
+    @JoinColumn(name = "video_id")
     private VideoEntity video;
 
-    @Column(nullable = false)
     private Integer videoIndex;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/QuizEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/QuizEntity.java
index 775ee2b6..40b36b78 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/QuizEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/QuizEntity.java
@@ -14,26 +14,18 @@ public class QuizEntity {
     private Long quizId;
 
     @ManyToOne
-    @JoinColumn(name = "video_id", nullable = false)
+    @JoinColumn(name = "video_id")
     private VideoEntity video;
 
-    @Column(nullable = false)
     private int type;
 
-    @Column(nullable = false)
     private String question;
 
-    @Column(nullable = true)
     private String subjectiveAnswer;
 
-    @Column(nullable = true)
     private Integer choiceAnswer;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Integer positiveFeedbackCount;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
-    private Integer negativeFeedbackCount;
+     private Integer negativeFeedbackCount;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/QuizOptionEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/QuizOptionEntity.java
index 3e9ae21b..7760cde1 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/QuizOptionEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/QuizOptionEntity.java
@@ -12,13 +12,10 @@ public class QuizOptionEntity {
 
 
     @ManyToOne
-    @JoinColumn(name = "quiz_id", nullable = false)
+    @JoinColumn(name = "quiz_id")
     private QuizEntity quiz;
 
-
-    @Column(nullable = false)
     private String optionText;
 
-    @Column(nullable = false)
     private int optionIndex;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/SummaryEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/SummaryEntity.java
index 6e51a97a..0acb7089 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/SummaryEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/SummaryEntity.java
@@ -16,26 +16,18 @@ public class SummaryEntity {
     private Long summaryId;
 
     @OneToOne
-    @JoinColumn(name = "video_id", nullable = false)
+    @JoinColumn(name = "video_id")
     private VideoEntity video;
 
-    @Column(nullable = false)
     private String content;
 
-    @Column(nullable = false)
     @CreationTimestamp
     @UpdateTimestamp
     private Timestamp updatedAt;
 
-    @Column(nullable = false)
-    @ColumnDefault("false")
     private boolean modified;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Integer positiveFeedbackCount;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Integer negativeFeedbackCount;
 }
diff --git a/src/main/java/com/m9d/sroom/common/entity/jpa/VideoEntity.java b/src/main/java/com/m9d/sroom/common/entity/jpa/VideoEntity.java
index 4fe65185..bc2c7fd9 100644
--- a/src/main/java/com/m9d/sroom/common/entity/jpa/VideoEntity.java
+++ b/src/main/java/com/m9d/sroom/common/entity/jpa/VideoEntity.java
@@ -15,73 +15,47 @@ public class VideoEntity {
     @GeneratedValue(strategy = GenerationType.AUTO)
     private Long videoId;
 
-    @Column(nullable = false, unique = true)
     private String videoCode;
 
-    @Column(nullable = false)
     private String title;
 
-    @Column(nullable = false)
     private String channel;
 
-    @Column(nullable = true)
     private String description;
 
-    @Column(nullable = false)
     private int duration;
 
-    @Column(nullable = false)
     private boolean playlist;
 
-    @Column(nullable = true)
     private Long viewCount;
 
-    @Column(nullable = false)
     private Timestamp publishedAt;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private int accumulatedRating;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private int reviewCount;
 
-    @Column(nullable = false)
     private String thumbnail;
 
-    @Column(nullable = true)
     private String language;
 
-    @Column(nullable = false)
     private String license;
 
-    @Column(nullable = false)
     @CreationTimestamp
     @UpdateTimestamp
     private Timestamp updatedAt;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private boolean membership;
 
     @OneToOne
-    @JoinColumn(name = "summary_id", nullable = true)
+    @JoinColumn(name = "summary_id")
     private SummaryEntity summary;
 
-    @Column(nullable = false)
-    @ColumnDefault("1")
     private boolean available;
 
-    @Column(nullable = true)
-    @ColumnDefault("0")
     private boolean chapterUse;
 
-    @Column(nullable = false)
-    @ColumnDefault("-2")
     private Integer materialStatus;
 
-    @Column(nullable = false)
-    @ColumnDefault("0")
     private Float averageRating;
 }