diff --git a/callbacks/create.go b/callbacks/create.go
index 9dc5b8b1..29113128 100644
--- a/callbacks/create.go
+++ b/callbacks/create.go
@@ -57,7 +57,7 @@ func Create(config *Config) func(db *gorm.DB) {
 			}
 		}
 
-		if db.Statement.SQL.String() == "" {
+		if db.Statement.SQL.Len() == 0 {
 			db.Statement.SQL.Grow(180)
 			db.Statement.AddClauseIfNotExists(clause.Insert{})
 			db.Statement.AddClause(ConvertToCreateValues(db.Statement))
diff --git a/callbacks/delete.go b/callbacks/delete.go
index b05a9d08..7f1e09ce 100644
--- a/callbacks/delete.go
+++ b/callbacks/delete.go
@@ -118,13 +118,7 @@ func Delete(config *Config) func(db *gorm.DB) {
 			return
 		}
 
-		if db.Statement.Schema != nil && !db.Statement.Unscoped {
-			for _, c := range db.Statement.Schema.DeleteClauses {
-				db.Statement.AddClause(c)
-			}
-		}
-
-		if db.Statement.SQL.String() == "" {
+		if db.Statement.SQL.Len() == 0 {
 			db.Statement.SQL.Grow(100)
 			db.Statement.AddClauseIfNotExists(clause.Delete{})
 
@@ -147,6 +141,15 @@ func Delete(config *Config) func(db *gorm.DB) {
 			}
 
 			db.Statement.AddClauseIfNotExists(clause.From{})
+		}
+
+		if db.Statement.Schema != nil {
+			for _, c := range db.Statement.Schema.DeleteClauses {
+				db.Statement.AddClause(c)
+			}
+		}
+
+		if db.Statement.SQL.Len() == 0 {
 			db.Statement.Build(db.Statement.BuildClauses...)
 		}
 
diff --git a/callbacks/query.go b/callbacks/query.go
index 2f98a4b6..efb08609 100644
--- a/callbacks/query.go
+++ b/callbacks/query.go
@@ -33,7 +33,7 @@ func BuildQuerySQL(db *gorm.DB) {
 		}
 	}
 
-	if db.Statement.SQL.String() == "" {
+	if db.Statement.SQL.Len() == 0 {
 		db.Statement.SQL.Grow(100)
 		clauseSelect := clause.Select{Distinct: db.Statement.Distinct}
 
diff --git a/callbacks/update.go b/callbacks/update.go
index fa7640de..b3eaaf11 100644
--- a/callbacks/update.go
+++ b/callbacks/update.go
@@ -59,13 +59,7 @@ func Update(config *Config) func(db *gorm.DB) {
 			return
 		}
 
-		if db.Statement.Schema != nil && !db.Statement.Unscoped {
-			for _, c := range db.Statement.Schema.UpdateClauses {
-				db.Statement.AddClause(c)
-			}
-		}
-
-		if db.Statement.SQL.String() == "" {
+		if db.Statement.SQL.Len() == 0 {
 			db.Statement.SQL.Grow(180)
 			db.Statement.AddClauseIfNotExists(clause.Update{})
 			if set := ConvertToAssignments(db.Statement); len(set) != 0 {
@@ -73,6 +67,16 @@ func Update(config *Config) func(db *gorm.DB) {
 			} else if _, ok := db.Statement.Clauses["SET"]; !ok {
 				return
 			}
+
+		}
+
+		if db.Statement.Schema != nil {
+			for _, c := range db.Statement.Schema.UpdateClauses {
+				db.Statement.AddClause(c)
+			}
+		}
+
+		if db.Statement.SQL.Len() == 0 {
 			db.Statement.Build(db.Statement.BuildClauses...)
 		}
 
diff --git a/soft_delete.go b/soft_delete.go
index 11c4fafc..4e236fc4 100644
--- a/soft_delete.go
+++ b/soft_delete.go
@@ -103,7 +103,7 @@ func (sd SoftDeleteUpdateClause) MergeClause(*clause.Clause) {
 }
 
 func (sd SoftDeleteUpdateClause) ModifyStatement(stmt *Statement) {
-	if stmt.SQL.String() == "" {
+	if stmt.SQL.Len() == 0 && !stmt.Statement.Unscoped {
 		if _, ok := stmt.Clauses["WHERE"]; stmt.DB.AllowGlobalUpdate || ok {
 			SoftDeleteQueryClause(sd).ModifyStatement(stmt)
 		}
@@ -129,7 +129,7 @@ func (sd SoftDeleteDeleteClause) MergeClause(*clause.Clause) {
 }
 
 func (sd SoftDeleteDeleteClause) ModifyStatement(stmt *Statement) {
-	if stmt.SQL.String() == "" {
+	if stmt.SQL.Len() == 0 && !stmt.Statement.Unscoped {
 		curTime := stmt.DB.NowFunc()
 		stmt.AddClause(clause.Set{{Column: clause.Column{Name: sd.Field.DBName}, Value: curTime}})
 		stmt.SetColumn(sd.Field.DBName, curTime, true)
diff --git a/tests/update_test.go b/tests/update_test.go
index 14ed9820..abe520db 100644
--- a/tests/update_test.go
+++ b/tests/update_test.go
@@ -645,7 +645,13 @@ func TestSave(t *testing.T) {
 
 	dryDB := DB.Session(&gorm.Session{DryRun: true})
 	stmt := dryDB.Save(&user).Statement
-	if !regexp.MustCompile("WHERE .id. = [^ ]+$").MatchString(stmt.SQL.String()) {
+	if !regexp.MustCompile(`.id. = .* AND .users.\..deleted_at. IS NULL`).MatchString(stmt.SQL.String()) {
+		t.Fatalf("invalid updating SQL, got %v", stmt.SQL.String())
+	}
+
+	dryDB = DB.Session(&gorm.Session{DryRun: true})
+	stmt = dryDB.Unscoped().Save(&user).Statement
+	if !regexp.MustCompile(`WHERE .id. = [^ ]+$`).MatchString(stmt.SQL.String()) {
 		t.Fatalf("invalid updating SQL, got %v", stmt.SQL.String())
 	}