diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleExprParser.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleExprParser.java
index 0ef015339c..85f8b7a796 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleExprParser.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/oracle/parser/OracleExprParser.java
@@ -332,7 +332,7 @@ public class OracleExprParser extends SQLExprParser {
 
             lexer.nextToken();
 
-            if (identifierEquals("SIBINGS")) {
+            if (identifierEquals("SIBLINGS")) {
                 lexer.nextToken();
                 orderBy.setSibings(true);
             }
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java
index ad006a9b9a..9e74180520 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java
@@ -359,10 +359,12 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
     }
 
     public boolean visit(OracleSelectHierachicalQueryClause x) {
-        print("START WITH ");
-        x.getStartWith().accept(this);
+        if (x.getStartWith() != null) {
+            print("START WITH ");
+            x.getStartWith().accept(this);
+            println();
+        }
 
-        println();
         print("CONNECT BY ");
 
         if (x.isPrior()) {
@@ -1325,19 +1327,19 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
                 print(opt.name);
             }
         }
-        
+
         if (x.getIterate() != null) {
             print(" ITERATE (");
             x.getIterate().accept(this);
             print(")");
-            
+
             if (x.getUntil() != null) {
                 print(" UNTIL (");
                 x.getUntil().accept(this);
                 print(")");
             }
         }
-        
+
         print(" (");
         printAndAccept(x.getCellAssignmentItems(), ", ");
         print(")");
@@ -1356,23 +1358,23 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
             print(x.getOption().name);
             print(" ");
         }
-        
+
         x.getCellAssignment().accept(this);
-        
+
         if (x.getOrderBy() != null) {
             print(" ");
             x.getOrderBy().accept(this);
         }
-        
+
         print(" = ");
         x.getExpr().accept(this);
-        
+
         return false;
     }
 
     @Override
     public void endVisit(CellAssignmentItem x) {
-        
+
     }
 
     @Override
@@ -1386,6 +1388,6 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
 
     @Override
     public void endVisit(CellAssignment x) {
-        
+
     }
 }
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleIsLiteralTest.java b/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleLiteralTest.java
similarity index 88%
rename from src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleIsLiteralTest.java
rename to src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleLiteralTest.java
index 6227627968..1d1dc9d6aa 100644
--- a/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleIsLiteralTest.java
+++ b/src/test/java/com/alibaba/druid/bvt/sql/oracle/OracleLiteralTest.java
@@ -5,10 +5,9 @@ import junit.framework.TestCase;
 
 import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
 import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
-import com.alibaba.druid.sql.parser.SQLStatementParser;
 import com.alibaba.druid.sql.test.TestUtils;
 
-public class OracleIsLiteralTest extends TestCase {
+public class OracleLiteralTest extends TestCase {
 
     public void test_oracle() throws Exception {
         String sql = "SELECT FROM_TZ(TIMESTAMP '2007-11-20 08:00:00', '3:00') FROM DUAL;";
diff --git a/src/test/java/com/alibaba/druid/bvt/sql/oracle/OraclePriorTest.java b/src/test/java/com/alibaba/druid/bvt/sql/oracle/OraclePriorTest.java
new file mode 100644
index 0000000000..e7121832a8
--- /dev/null
+++ b/src/test/java/com/alibaba/druid/bvt/sql/oracle/OraclePriorTest.java
@@ -0,0 +1,46 @@
+package com.alibaba.druid.bvt.sql.oracle;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.sql.ast.statement.SQLSelectStatement;
+import com.alibaba.druid.sql.dialect.oracle.parser.OracleStatementParser;
+import com.alibaba.druid.sql.test.TestUtils;
+
+public class OraclePriorTest extends TestCase {
+
+    public void test_oracle() throws Exception {
+        String sql = "SELECT employee_id, last_name, manager_id FROM employees CONNECT BY PRIOR employee_id = manager_id;";
+
+        String expect = "SELECT employee_id, last_name, manager_id\n" + "FROM employees\n"
+                        + "CONNECT BY PRIOR employee_id = manager_id;\n";
+
+        OracleStatementParser parser = new OracleStatementParser(sql);
+        SQLSelectStatement stmt = (SQLSelectStatement) parser.parseStatementList().get(0);
+
+        String text = TestUtils.outputOracle(stmt);
+
+        Assert.assertEquals(expect, text);
+
+        System.out.println(text);
+    }
+
+    public void test_oracle_2() throws Exception {
+        String sql = "SELECT last_name, employee_id, manager_id, LEVEL\n" + "FROM employees\n"
+                     + "START WITH employee_id = 100\n" + "CONNECT BY PRIOR employee_id = manager_id\n"
+                     + "ORDER SIBLINGS BY last_name;";
+
+        String expect = "SELECT last_name, employee_id, manager_id, LEVEL\n" + "FROM employees\n"
+                + "START WITH employee_id = 100\n" + "CONNECT BY PRIOR employee_id = manager_id\n"
+                + "ORDER SIBLINGS BY last_name;\n";
+
+        OracleStatementParser parser = new OracleStatementParser(sql);
+        SQLSelectStatement stmt = (SQLSelectStatement) parser.parseStatementList().get(0);
+
+        String text = TestUtils.outputOracle(stmt);
+
+        Assert.assertEquals(expect, text);
+
+        System.out.println(text);
+    }
+}