diff --git a/SurveyLib.Infrastructure.EFCore/Repositories/CompletionRepository.cs b/SurveyLib.Infrastructure.EFCore/Repositories/CompletionRepository.cs
index e33eba6..bef9e48 100644
--- a/SurveyLib.Infrastructure.EFCore/Repositories/CompletionRepository.cs
+++ b/SurveyLib.Infrastructure.EFCore/Repositories/CompletionRepository.cs
@@ -1,3 +1,4 @@
+using Microsoft.EntityFrameworkCore;
 using SurveyLib.Core.Models;
 using SurveyLib.Core.Repositories;
 using SurveyLib.Infrastructure.EFCore.Data;
@@ -13,33 +14,36 @@ public class CompletionRepository : ICompletionRepository
         _context = context;
     }
 
-    public Task<Completion?> GetByIdAsync(int id)
+    public async Task<Completion?> GetByIdAsync(int id)
     {
-        throw new NotImplementedException();
+        return await _context.Completions.FirstOrDefaultAsync(c => c.Id == id);
     }
 
-    public Task<IEnumerable<Completion>> GetAllAsync()
+    public async Task<IEnumerable<Completion>> GetAllAsync()
     {
-        throw new NotImplementedException();
+        return await _context.Completions.ToListAsync();
     }
 
-    public Task AddAsync(Completion entity)
+    public async Task AddAsync(Completion entity)
     {
-        throw new NotImplementedException();
+        await _context.Completions.AddAsync(entity);
+        await _context.SaveChangesAsync();
     }
 
-    public Task UpdateAsync(Completion entity)
+    public async Task UpdateAsync(Completion entity)
     {
-        throw new NotImplementedException();
+        _context.Completions.Update(entity);
+        await _context.SaveChangesAsync();
     }
 
-    public Task DeleteAsync(Completion entity)
+    public async Task DeleteAsync(Completion entity)
     {
-        throw new NotImplementedException();
+        _context.Completions.Remove(entity);
+        await _context.SaveChangesAsync();
     }
 
-    public Task<IEnumerable<Completion>> GetBySurveyIdAsync(int surveyId)
+    public async Task<IEnumerable<Completion>> GetBySurveyIdAsync(int surveyId)
     {
-        throw new NotImplementedException();
+        return await _context.Completions.Where(c => c.SurveyId == surveyId).ToListAsync();
     }
 }
\ No newline at end of file