diff --git a/orm_lib/inc/drogon/orm/Exception.h b/orm_lib/inc/drogon/orm/Exception.h
index a3041f73..f40211d1 100644
--- a/orm_lib/inc/drogon/orm/Exception.h
+++ b/orm_lib/inc/drogon/orm/Exception.h
@@ -137,15 +137,24 @@ class SqlError : public Failure
     /// SQLSTATE string describing the error type, if known; or empty string.
     const std::string sqlState_;
 
+    const int errcode_{0};
+    const int extendedErrcode_{0};
+
   public:
     DROGON_EXPORT explicit SqlError(const std::string &msg = "",
                                     const std::string &Q = "",
                                     const char sqlstate[] = nullptr);
+    DROGON_EXPORT explicit SqlError(const std::string &msg,
+                                    const std::string &Q,
+                                    const int errcode,
+                                    const int extendedErrcode);
     DROGON_EXPORT virtual ~SqlError() noexcept;
 
     /// The query whose execution triggered the exception
     DROGON_EXPORT const std::string &query() const noexcept;
     DROGON_EXPORT const std::string &sqlState() const noexcept;
+    DROGON_EXPORT int errcode() const noexcept;
+    DROGON_EXPORT int extendedErrcode() const noexcept;
 };
 
 /// "Help, I don't know whether transaction was committed successfully!"
@@ -293,6 +302,14 @@ class FeatureNotSupported : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit FeatureNotSupported(const std::string &msg,
+                                 const std::string &Q,
+                                 const int errcode,
+                                 const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 /// Error in data provided to SQL statement
@@ -305,6 +322,14 @@ class DataException : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit DataException(const std::string &msg,
+                           const std::string &Q,
+                           const int errcode,
+                           const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class IntegrityConstraintViolation : public SqlError
@@ -316,6 +341,14 @@ class IntegrityConstraintViolation : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit IntegrityConstraintViolation(const std::string &msg,
+                                          const std::string &Q,
+                                          const int errcode,
+                                          const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class RestrictViolation : public IntegrityConstraintViolation
@@ -327,6 +360,14 @@ class RestrictViolation : public IntegrityConstraintViolation
         : IntegrityConstraintViolation(err, Q, sqlstate)
     {
     }
+
+    explicit RestrictViolation(const std::string &msg,
+                               const std::string &Q,
+                               const int errcode,
+                               const int extendedErrcode)
+        : IntegrityConstraintViolation(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class NotNullViolation : public IntegrityConstraintViolation
@@ -338,6 +379,14 @@ class NotNullViolation : public IntegrityConstraintViolation
         : IntegrityConstraintViolation(err, Q, sqlstate)
     {
     }
+
+    explicit NotNullViolation(const std::string &msg,
+                              const std::string &Q,
+                              const int errcode,
+                              const int extendedErrcode)
+        : IntegrityConstraintViolation(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class ForeignKeyViolation : public IntegrityConstraintViolation
@@ -349,6 +398,14 @@ class ForeignKeyViolation : public IntegrityConstraintViolation
         : IntegrityConstraintViolation(err, Q, sqlstate)
     {
     }
+
+    explicit ForeignKeyViolation(const std::string &msg,
+                                 const std::string &Q,
+                                 const int errcode,
+                                 const int extendedErrcode)
+        : IntegrityConstraintViolation(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class UniqueViolation : public IntegrityConstraintViolation
@@ -360,6 +417,14 @@ class UniqueViolation : public IntegrityConstraintViolation
         : IntegrityConstraintViolation(err, Q, sqlstate)
     {
     }
+
+    explicit UniqueViolation(const std::string &msg,
+                             const std::string &Q,
+                             const int errcode,
+                             const int extendedErrcode)
+        : IntegrityConstraintViolation(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class CheckViolation : public IntegrityConstraintViolation
@@ -371,6 +436,14 @@ class CheckViolation : public IntegrityConstraintViolation
         : IntegrityConstraintViolation(err, Q, sqlstate)
     {
     }
+
+    explicit CheckViolation(const std::string &msg,
+                            const std::string &Q,
+                            const int errcode,
+                            const int extendedErrcode)
+        : IntegrityConstraintViolation(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class InvalidCursorState : public SqlError
@@ -382,6 +455,14 @@ class InvalidCursorState : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit InvalidCursorState(const std::string &msg,
+                                const std::string &Q,
+                                const int errcode,
+                                const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class InvalidSqlStatementName : public SqlError
@@ -393,6 +474,14 @@ class InvalidSqlStatementName : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit InvalidSqlStatementName(const std::string &msg,
+                                     const std::string &Q,
+                                     const int errcode,
+                                     const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class InvalidCursorName : public SqlError
@@ -404,6 +493,14 @@ class InvalidCursorName : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit InvalidCursorName(const std::string &msg,
+                               const std::string &Q,
+                               const int errcode,
+                               const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class SyntaxError : public SqlError
@@ -419,6 +516,15 @@ class SyntaxError : public SqlError
         : SqlError(err, Q, sqlstate), errorPosition_(pos)
     {
     }
+
+    explicit SyntaxError(const std::string &msg,
+                         const std::string &Q,
+                         const int errcode,
+                         const int extendedErrcode,
+                         int pos = -1)
+        : SqlError(msg, Q, errcode, extendedErrcode), errorPosition_(pos)
+    {
+    }
 };
 
 class UndefinedColumn : public SyntaxError
@@ -430,6 +536,14 @@ class UndefinedColumn : public SyntaxError
         : SyntaxError(err, Q, sqlstate)
     {
     }
+
+    explicit UndefinedColumn(const std::string &msg,
+                             const std::string &Q,
+                             const int errcode,
+                             const int extendedErrcode)
+        : SyntaxError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class UndefinedFunction : public SyntaxError
@@ -441,6 +555,14 @@ class UndefinedFunction : public SyntaxError
         : SyntaxError(err, Q, sqlstate)
     {
     }
+
+    explicit UndefinedFunction(const std::string &msg,
+                               const std::string &Q,
+                               const int errcode,
+                               const int extendedErrcode)
+        : SyntaxError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class UndefinedTable : public SyntaxError
@@ -452,6 +574,14 @@ class UndefinedTable : public SyntaxError
         : SyntaxError(err, Q, sqlstate)
     {
     }
+
+    explicit UndefinedTable(const std::string &msg,
+                            const std::string &Q,
+                            const int errcode,
+                            const int extendedErrcode)
+        : SyntaxError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class InsufficientPrivilege : public SqlError
@@ -463,6 +593,14 @@ class InsufficientPrivilege : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit InsufficientPrivilege(const std::string &msg,
+                                   const std::string &Q,
+                                   const int errcode,
+                                   const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 /// Resource shortage on the server
@@ -475,6 +613,14 @@ class InsufficientResources : public SqlError
         : SqlError(err, Q, sqlstate)
     {
     }
+
+    explicit InsufficientResources(const std::string &msg,
+                                   const std::string &Q,
+                                   const int errcode,
+                                   const int extendedErrcode)
+        : SqlError(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class DiskFull : public InsufficientResources
@@ -486,6 +632,14 @@ class DiskFull : public InsufficientResources
         : InsufficientResources(err, Q, sqlstate)
     {
     }
+
+    explicit DiskFull(const std::string &msg,
+                      const std::string &Q,
+                      const int errcode,
+                      const int extendedErrcode)
+        : InsufficientResources(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class OutOfMemory : public InsufficientResources
@@ -497,6 +651,14 @@ class OutOfMemory : public InsufficientResources
         : InsufficientResources(err, Q, sqlstate)
     {
     }
+
+    explicit OutOfMemory(const std::string &msg,
+                         const std::string &Q,
+                         const int errcode,
+                         const int extendedErrcode)
+        : InsufficientResources(msg, Q, errcode, extendedErrcode)
+    {
+    }
 };
 
 class TooManyConnections : public BrokenConnection
diff --git a/orm_lib/src/Exception.cc b/orm_lib/src/Exception.cc
index 7e5c2d08..fc02e611 100644
--- a/orm_lib/src/Exception.cc
+++ b/orm_lib/src/Exception.cc
@@ -42,7 +42,23 @@ BrokenConnection::BrokenConnection(const std::string &whatarg)
 SqlError::SqlError(const std::string &whatarg,
                    const std::string &Q,
                    const char sqlstate[])
-    : Failure(whatarg), query_(Q), sqlState_(sqlstate ? sqlstate : "")
+    : Failure(whatarg),
+      query_(Q),
+      sqlState_(sqlstate ? sqlstate : ""),
+      errcode_(0),
+      extendedErrcode_(0)
+{
+}
+
+SqlError::SqlError(const std::string &whatarg,
+                   const std::string &Q,
+                   const int errcode,
+                   const int extendedErrcode)
+    : Failure(whatarg),
+      query_(Q),
+      sqlState_(""),
+      errcode_(errcode),
+      extendedErrcode_(extendedErrcode)
 {
 }
 
@@ -60,6 +76,16 @@ const std::string &SqlError::sqlState() const noexcept
     return sqlState_;
 }
 
+int SqlError::errcode() const noexcept
+{
+    return errcode_;
+}
+
+int SqlError::extendedErrcode() const noexcept
+{
+    return extendedErrcode_;
+}
+
 InDoubtError::InDoubtError(const std::string &whatarg) : Failure(whatarg)
 {
 }
diff --git a/orm_lib/src/sqlite3_impl/Sqlite3Connection.cc b/orm_lib/src/sqlite3_impl/Sqlite3Connection.cc
index 8ad70c74..27abe13d 100644
--- a/orm_lib/src/sqlite3_impl/Sqlite3Connection.cc
+++ b/orm_lib/src/sqlite3_impl/Sqlite3Connection.cc
@@ -14,7 +14,10 @@
 
 #include "Sqlite3Connection.h"
 #include "Sqlite3ResultImpl.h"
+#include <drogon/orm/Exception.h>
 #include <drogon/utils/Utilities.h>
+#include <stdexcept>
+#include <string>
 #include <string_view>
 #include <cctype>
 #include <exception>
@@ -24,14 +27,54 @@
 using namespace drogon;
 using namespace drogon::orm;
 
+namespace
+{
+
+}
+
 std::once_flag Sqlite3Connection::once_;
 
 void Sqlite3Connection::onError(
     const std::string_view &sql,
-    const std::function<void(const std::exception_ptr &)> &exceptCallback)
+    const std::function<void(const std::exception_ptr &)> &exceptCallback,
+    const int &extendedErrcode)
 {
-    auto exceptPtr = std::make_exception_ptr(
-        SqlError(sqlite3_errmsg(connectionPtr_.get()), std::string{sql}));
+    int errcode = extendedErrcode & 0xFF;  // low 8 bit
+#define ORM_ERR_CASE(code, type)                                    \
+    case code:                                                      \
+    {                                                               \
+        auto exceptPtr = std::make_exception_ptr(                   \
+            drogon::orm::type(sqlite3_errmsg(connectionPtr_.get()), \
+                              std::string{sql},                     \
+                              errcode,                              \
+                              extendedErrcode));                    \
+        exceptCallback(exceptPtr);                                  \
+        return;                                                     \
+    };
+    switch (extendedErrcode)
+    {
+        ORM_ERR_CASE(SQLITE_CONSTRAINT_NOTNULL, NotNullViolation)
+        ORM_ERR_CASE(SQLITE_CONSTRAINT_FOREIGNKEY, ForeignKeyViolation)
+        ORM_ERR_CASE(SQLITE_CONSTRAINT_PRIMARYKEY, UniqueViolation)
+        ORM_ERR_CASE(SQLITE_CONSTRAINT_UNIQUE, UniqueViolation)
+        ORM_ERR_CASE(SQLITE_CONSTRAINT_CHECK, CheckViolation)
+    }
+    switch (errcode)
+    {
+        ORM_ERR_CASE(SQLITE_MISMATCH, DataException)
+        ORM_ERR_CASE(SQLITE_CONSTRAINT, IntegrityConstraintViolation)
+        ORM_ERR_CASE(SQLITE_PERM, InsufficientPrivilege)
+        ORM_ERR_CASE(SQLITE_AUTH, InsufficientPrivilege)
+        ORM_ERR_CASE(SQLITE_NOMEM, OutOfMemory)
+        ORM_ERR_CASE(SQLITE_FULL, DiskFull)
+    }
+#undef ORM_ERR_CASE
+
+    auto exceptPtr =
+        std::make_exception_ptr(SqlError(sqlite3_errmsg(connectionPtr_.get()),
+                                         std::string{sql},
+                                         errcode,
+                                         extendedErrcode));
     exceptCallback(exceptPtr);
 }
 
@@ -148,7 +191,8 @@ void Sqlite3Connection::execSqlInQueue(
                        : nullptr;
         if (ret != SQLITE_OK || !stmtPtr)
         {
-            onError(sql, exceptCallback);
+            int ext_ret = sqlite3_extended_errcode(connectionPtr_.get());
+            onError(sql, exceptCallback, ext_ret);
             idleCb_();
             return;
         }
@@ -207,13 +251,14 @@ void Sqlite3Connection::execSqlInQueue(
         }
         if (bindRet != SQLITE_OK)
         {
-            onError(sql, exceptCallback);
+            int eret = sqlite3_extended_errcode(connectionPtr_.get());
+            onError(sql, exceptCallback, eret);
             sqlite3_reset(stmt);
             idleCb_();
             return;
         }
     }
-    int r;
+    int r, er;
     int columnNum = sqlite3_column_count(stmt);
     auto resultPtr = std::make_shared<Sqlite3ResultImpl>();
     for (int i = 0; i < columnNum; ++i)
@@ -233,6 +278,10 @@ void Sqlite3Connection::execSqlInQueue(
         // Readonly, hold read lock;
         std::shared_lock<SharedMutex> lock(*sharedMutexPtr_);
         r = stmtStep(stmt, resultPtr, columnNum);
+        if (r != SQLITE_DONE)
+        {
+            er = sqlite3_extended_errcode(connectionPtr_.get());
+        }
         sqlite3_reset(stmt);
     }
     else
@@ -246,12 +295,16 @@ void Sqlite3Connection::execSqlInQueue(
             resultPtr->insertId_ =
                 sqlite3_last_insert_rowid(connectionPtr_.get());
         }
+        else
+        {
+            er = sqlite3_extended_errcode(connectionPtr_.get());
+        }
         sqlite3_reset(stmt);
     }
 
     if (r != SQLITE_DONE)
     {
-        onError(sql, exceptCallback);
+        onError(sql, exceptCallback, er);
         sqlite3_reset(stmt);
         idleCb_();
         return;
diff --git a/orm_lib/src/sqlite3_impl/Sqlite3Connection.h b/orm_lib/src/sqlite3_impl/Sqlite3Connection.h
index 8f3ed834..9cdd64c3 100644
--- a/orm_lib/src/sqlite3_impl/Sqlite3Connection.h
+++ b/orm_lib/src/sqlite3_impl/Sqlite3Connection.h
@@ -75,7 +75,8 @@ class Sqlite3Connection : public DbConnection,
         const std::function<void(const std::exception_ptr &)> &exceptCallback);
     void onError(
         const std::string_view &sql,
-        const std::function<void(const std::exception_ptr &)> &exceptCallback);
+        const std::function<void(const std::exception_ptr &)> &exceptCallback,
+        const int &extendedErrcode);
     int stmtStep(sqlite3_stmt *stmt,
                  const std::shared_ptr<Sqlite3ResultImpl> &resultPtr,
                  int columnNum);