diff --git a/src/adapter/db/base.js b/src/adapter/db/base.js
index ec268d80..49566587 100644
--- a/src/adapter/db/base.js
+++ b/src/adapter/db/base.js
@@ -17,6 +17,7 @@ export default class extends Parse {
     this.sql = '';
     this.lastInsertId = 0;
     this._socket = null;
+    this.transTimes = 0; //transaction times
   }
   /**
    * get socket instance, override by sub class
@@ -231,6 +232,40 @@ export default class extends Parse {
       return data.affectedRows || 0;
     });
   }
+  /**
+   * start transaction
+   * @return {Promise} []
+   */
+  startTrans(){
+    if (this.transTimes === 0) {
+      this.transTimes++;
+      return this.execute('START TRANSACTION');
+    }
+    this.transTimes++;
+    return Promise.resolve();
+  }
+  /**
+   * commit
+   * @return {Promise} []
+   */
+  commit(){
+    if (this.transTimes > 0) {
+      this.transTimes = 0;
+      return this.execute('COMMIT');
+    }
+    return Promise.resolve();
+  }
+  /**
+   * rollback
+   * @return {Promise} []
+   */
+  rollback(){
+    if (this.transTimes > 0) {
+      this.transTimes = 0;
+      return this.execute('ROLLBACK');
+    }
+    return Promise.resolve();
+  }
   /**
    * close connect
    * @return {} []
diff --git a/src/adapter/db/mysql.js b/src/adapter/db/mysql.js
index cb92c632..d6143f1f 100644
--- a/src/adapter/db/mysql.js
+++ b/src/adapter/db/mysql.js
@@ -6,15 +6,6 @@ let MysqlSocket = think.adapter('socket', 'mysql');
  * @type {Class}
  */
 export default class extends think.adapter.db {
-  /**
-   * init
-   * @param  {Object} config []
-   * @return {}        []
-   */
-  init(config){
-    super.init(config);
-    this.transTimes = 0; //transaction times
-  }
   /**
    * get mysql socket instance
    * @param  {Object} config []
@@ -48,40 +39,6 @@ export default class extends think.adapter.db {
     });
     return ret;
   }
-  /**
-   * start transaction
-   * @return {Promise} []
-   */
-  startTrans(){
-    if (this.transTimes === 0) {
-      this.transTimes++;
-      return this.execute('START TRANSACTION');
-    }
-    this.transTimes++;
-    return Promise.resolve();
-  }
-  /**
-   * commit
-   * @return {Promise} []
-   */
-  commit(){
-    if (this.transTimes > 0) {
-      this.transTimes = 0;
-      return this.execute('COMMIT');
-    }
-    return Promise.resolve();
-  }
-  /**
-   * rollback
-   * @return {Promise} []
-   */
-  rollback(){
-    if (this.transTimes > 0) {
-      this.transTimes = 0;
-      return this.execute('ROLLBACK');
-    }
-    return Promise.resolve();
-  }
   /**
    * parse key
    * @param  {String} key []
diff --git a/src/adapter/db/sqlite.js b/src/adapter/db/sqlite.js
index 8eb1d594..864ab6cd 100644
--- a/src/adapter/db/sqlite.js
+++ b/src/adapter/db/sqlite.js
@@ -25,6 +25,7 @@ export default class extends think.adapter.db {
   async getFields(table){
     let data = await this.query(`PRAGMA table_info( ${table} )`);
     let ret = {};
+    console.log(data);
     data.forEach(item => {
       ret[item.name] = {
         name: item.name,
@@ -35,10 +36,10 @@ export default class extends think.adapter.db {
         auto_increment: false
       };
     });
-    if(data.length === 0){
-      let msg = new Error(think.local('TABLE_NO_COLUMNS', table));
-      return think.reject(msg);
-    }
+    // if(data.length === 0){
+    //   let msg = new Error(think.local('TABLE_NO_COLUMNS', table));
+    //   return think.reject(msg);
+    // }
     return ret;
   }
   /**
@@ -55,11 +56,11 @@ export default class extends think.adapter.db {
    * @return {String}       []
    */
   parseLimit(limit){
-    if (!limit) {
+    if (think.isEmpty(limit)) {
       return '';
     }
     if(think.isString(limit)){
-      limit = limit.split(',');
+      limit = limit.split(/\s*,\s*/);
     }
     if(limit[1]){
       return ' LIMIT ' + (limit[1] | 0) + ' OFFSET ' + (limit[0] | 0);
diff --git a/test/adapter/db/base.js b/test/adapter/db/base.js
index 8c3e842b..a5f48228 100644
--- a/test/adapter/db/base.js
+++ b/test/adapter/db/base.js
@@ -20,6 +20,7 @@ describe('adapter/db/base.js', function(){
     assert.equal(instance.sql, '');
     assert.equal(instance.lastInsertId, 0);
     assert.equal(instance._socket, null);
+    assert.equal(instance.transTimes, 0);
   })
   it('socket is function', function(){
     var instance = new Base();
@@ -394,4 +395,91 @@ describe('adapter/db/base.js', function(){
     instance.close();
     assert.equal(flag, false);
   })
+  it('startTrans', function(done){
+    var instance = new Base();
+    var flag = false;
+    instance.execute = function(sql){
+      assert.equal(sql, 'START TRANSACTION');
+      flag = true;
+      return Promise.resolve();
+    }
+    instance.startTrans().then(function(data){
+      assert.equal(flag, true);
+      instance.transTimes = 1;
+      done();
+    })
+  })
+  it('startTrans, is started', function(done){
+    var instance = new Base();
+    instance.transTimes = 1;
+    var flag = false;
+    instance.execute = function(sql){
+      assert.equal(sql, 'START TRANSACTION');
+      flag = true;
+      return Promise.resolve();
+    }
+    instance.startTrans().then(function(data){
+      assert.equal(flag, false);
+      instance.transTimes = 1;
+      done();
+    })
+  })
+  it('commit, not start', function(done){
+    var instance = new Base();
+    var flag = false;
+    instance.execute = function(sql){
+      assert.equal(sql, 'ROLLBACK');
+      flag = true;
+      return Promise.resolve();
+    }
+    instance.commit().then(function(data){
+      assert.equal(flag, false);
+      instance.transTimes = 0;
+      done();
+    })
+  })
+  it('commit', function(done){
+    var instance = new Base();
+    instance.transTimes = 1;
+    var flag = false;
+    instance.execute = function(sql){
+      assert.equal(sql, 'COMMIT');
+      flag = true;
+      return Promise.resolve();
+    }
+    instance.commit().then(function(data){
+      assert.equal(flag, true);
+      instance.transTimes = 0;
+      done();
+    })
+  })
+  it('rollback, not start', function(done){
+    var instance = new Base();
+    var flag = false;
+    instance.execute = function(sql){
+      assert.equal(sql, 'ROLLBACK');
+      flag = true;
+      return Promise.resolve();
+    }
+    instance.rollback().then(function(data){
+      assert.equal(flag, false);
+      instance.transTimes = 0;
+      done();
+    })
+  })
+  it('rollback', function(done){
+    var instance = new Base();
+    instance.transTimes = 1;
+    var flag = false;
+    instance.execute = function(sql){
+      assert.equal(sql, 'ROLLBACK');
+      flag = true;
+      return Promise.resolve();
+    }
+    instance.rollback().then(function(data){
+      assert.equal(flag, true);
+      instance.transTimes = 0;
+      done();
+    })
+  })
 })
\ No newline at end of file
diff --git a/test/adapter/db/mysql.js b/test/adapter/db/mysql.js
index 593214fb..3f870b4a 100644
--- a/test/adapter/db/mysql.js
+++ b/test/adapter/db/mysql.js
@@ -43,93 +43,6 @@ describe('adapter/db/mysql.js', function(){
       done();
     })
   })
-  it('startTrans', function(done){
-    var instance = new Mysql();
-    var flag = false;
-    instance.execute = function(sql){
-      assert.equal(sql, 'START TRANSACTION');
-      flag = true;
-      return Promise.resolve();
-    }
-    instance.startTrans().then(function(data){
-      assert.equal(flag, true);
-      instance.transTimes = 1;
-      done();
-    })
-  })
-  it('startTrans, is started', function(done){
-    var instance = new Mysql();
-    instance.transTimes = 1;
-    var flag = false;
-    instance.execute = function(sql){
-      assert.equal(sql, 'START TRANSACTION');
-      flag = true;
-      return Promise.resolve();
-    }
-    instance.startTrans().then(function(data){
-      assert.equal(flag, false);
-      instance.transTimes = 1;
-      done();
-    })
-  })
-  it('commit, not start', function(done){
-    var instance = new Mysql();
-    var flag = false;
-    instance.execute = function(sql){
-      assert.equal(sql, 'ROLLBACK');
-      flag = true;
-      return Promise.resolve();
-    }
-    instance.commit().then(function(data){
-      assert.equal(flag, false);
-      instance.transTimes = 0;
-      done();
-    })
-  })
-  it('commit', function(done){
-    var instance = new Mysql();
-    instance.transTimes = 1;
-    var flag = false;
-    instance.execute = function(sql){
-      assert.equal(sql, 'COMMIT');
-      flag = true;
-      return Promise.resolve();
-    }
-    instance.commit().then(function(data){
-      assert.equal(flag, true);
-      instance.transTimes = 0;
-      done();
-    })
-  })
-  it('rollback, not start', function(done){
-    var instance = new Mysql();
-    var flag = false;
-    instance.execute = function(sql){
-      assert.equal(sql, 'ROLLBACK');
-      flag = true;
-      return Promise.resolve();
-    }
-    instance.rollback().then(function(data){
-      assert.equal(flag, false);
-      instance.transTimes = 0;
-      done();
-    })
-  })
-  it('rollback', function(done){
-    var instance = new Mysql();
-    instance.transTimes = 1;
-    var flag = false;
-    instance.execute = function(sql){
-      assert.equal(sql, 'ROLLBACK');
-      flag = true;
-      return Promise.resolve();
-    }
-    instance.rollback().then(function(data){
-      assert.equal(flag, true);
-      instance.transTimes = 0;
-      done();
-    })
-  })
   it('parseKey, empty', function(){
     var instance = new Mysql();
     var data = instance.parseKey();