diff --git a/os-system/src/main/resources/mapper/system/SysConfigMapper.xml b/os-system/src/main/resources/mapper/system/SysConfigMapper.xml
index b4c272e..b25c9a1 100644
--- a/os-system/src/main/resources/mapper/system/SysConfigMapper.xml
+++ b/os-system/src/main/resources/mapper/system/SysConfigMapper.xml
@@ -67,9 +67,10 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     </select>
 
     <select id="checkConfigKeyUnique" parameterType="String" resultMap="SysConfigResult">
-        select top(1) config_id, config_name, config_key, config_value, config_type, create_by, create_time, update_by, update_time, remark
+        select  config_id, config_name, config_key, config_value, config_type, create_by, create_time, update_by, update_time, remark
         from sys_config
         where config_key = #{configKey}
+            LIMIT 1
     </select>
     
     <insert id="insertConfig" parameterType="SysConfig">
diff --git a/os-system/src/main/resources/mapper/system/SysDeptMapper.xml b/os-system/src/main/resources/mapper/system/SysDeptMapper.xml
index dea75fe..76bc298 100644
--- a/os-system/src/main/resources/mapper/system/SysDeptMapper.xml
+++ b/os-system/src/main/resources/mapper/system/SysDeptMapper.xml
@@ -70,8 +70,9 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="hasChildByDeptId" parameterType="Long" resultType="int">
-		select top(1) count(1) from sys_dept
+		select  count(1) from sys_dept
 		where del_flag = '0' and parent_id = #{deptId}
+			LIMIT 1
 	</select>
 	
 	<select id="selectChildrenDeptById" parameterType="Long" resultMap="SysDeptResult">
@@ -83,9 +84,10 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkDeptNameUnique" resultMap="SysDeptResult">
-		select top(1) d.dept_id, d.parent_id, d.ancestors, d.dept_name, d.order_num, d.leader, d.phone, d.email, d.status, d.del_flag, d.create_by, d.create_time
+		select  d.dept_id, d.parent_id, d.ancestors, d.dept_name, d.order_num, d.leader, d.phone, d.email, d.status, d.del_flag, d.create_by, d.create_time
 		from sys_dept d
 		where dept_name=#{deptName} and parent_id = #{parentId} and del_flag = '0'
+			LIMIT 1
 	</select>
     
     <insert id="insertDept" parameterType="SysDept">
diff --git a/os-system/src/main/resources/mapper/system/SysPostMapper.xml b/os-system/src/main/resources/mapper/system/SysPostMapper.xml
index 63cdc1b..e0b584a 100644
--- a/os-system/src/main/resources/mapper/system/SysPostMapper.xml
+++ b/os-system/src/main/resources/mapper/system/SysPostMapper.xml
@@ -63,15 +63,17 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkPostNameUnique" parameterType="String" resultMap="SysPostResult">
-		select top(1) post_id, post_code, post_name, post_sort, status, create_by, create_time, remark
+		select post_id, post_code, post_name, post_sort, status, create_by, create_time, remark
 		from sys_post
 		where post_name=#{postName}
+			LIMIT 1
 	</select>
 	
 	<select id="checkPostCodeUnique" parameterType="String" resultMap="SysPostResult">
-		select top(1) post_id, post_code, post_name, post_sort, status, create_by, create_time, remark
+		select  post_id, post_code, post_name, post_sort, status, create_by, create_time, remark
 		from sys_post
 		where post_code=#{postCode}
+			LIMIT 1
 	</select>
 	
 	<update id="updatePost" parameterType="SysPost">
diff --git a/os-system/src/main/resources/mapper/system/SysRoleMapper.xml b/os-system/src/main/resources/mapper/system/SysRoleMapper.xml
index e6c4983..b1815d1 100644
--- a/os-system/src/main/resources/mapper/system/SysRoleMapper.xml
+++ b/os-system/src/main/resources/mapper/system/SysRoleMapper.xml
@@ -86,23 +86,25 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkRoleNameUnique" parameterType="String" resultMap="SysRoleResult">
-		select distinct top(1) r.role_id, r.role_name, r.role_key, r.role_sort, r.data_scope, r.menu_check_strictly, r.dept_check_strictly,
+		select distinct  r.role_id, r.role_name, r.role_key, r.role_sort, r.data_scope, r.menu_check_strictly, r.dept_check_strictly,
 		r.status, r.del_flag, r.create_time, r.remark
 		from sys_role r
 		left join sys_user_role ur on ur.role_id = r.role_id
 		left join sys_user u on u.user_id = ur.user_id
 		left join sys_dept d on u.dept_id = d.dept_id
 		where r.role_name=#{roleName} and r.del_flag = '0'
+		LIMIT 1
 	</select>
 	
 	<select id="checkRoleKeyUnique" parameterType="String" resultMap="SysRoleResult">
-		select distinct top(1) r.role_id, r.role_name, r.role_key, r.role_sort, r.data_scope, r.menu_check_strictly, r.dept_check_strictly,
+		select distinct  r.role_id, r.role_name, r.role_key, r.role_sort, r.data_scope, r.menu_check_strictly, r.dept_check_strictly,
 		r.status, r.del_flag, r.create_time, r.remark
 		from sys_role r
 		left join sys_user_role ur on ur.role_id = r.role_id
 		left join sys_user u on u.user_id = ur.user_id
 		left join sys_dept d on u.dept_id = d.dept_id
 		where r.role_key=#{roleKey} and r.del_flag = '0'
+				LIMIT 1
 	</select>
 	
  	<insert id="insertRole" parameterType="SysRole" useGeneratedKeys="true" keyProperty="roleId">
diff --git a/os-system/src/main/resources/mapper/system/SysUserMapper.xml b/os-system/src/main/resources/mapper/system/SysUserMapper.xml
index 9c3173b..ec80c2a 100644
--- a/os-system/src/main/resources/mapper/system/SysUserMapper.xml
+++ b/os-system/src/main/resources/mapper/system/SysUserMapper.xml
@@ -133,15 +133,18 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkUserNameUnique" parameterType="String" resultMap="SysUserResult">
-		select top(1) user_id, user_name from sys_user where user_name = #{userName} and del_flag = '0'
+		select  user_id, user_name from sys_user where user_name = #{userName} and del_flag = '0'
+			LIMIT 1
 	</select>
 	
 	<select id="checkPhoneUnique" parameterType="String" resultMap="SysUserResult">
-		select top(1) user_id, phonenumber from sys_user where phonenumber = #{phonenumber} and del_flag = '0'
+		select  user_id, phonenumber from sys_user where phonenumber = #{phonenumber} and del_flag = '0'
+			LIMIT 1
 	</select>
 	
 	<select id="checkEmailUnique" parameterType="String" resultMap="SysUserResult">
-		select top(1) user_id, email from sys_user where email = #{email} and del_flag = '0'
+		select  user_id, email from sys_user where email = #{email} and del_flag = '0'
+			LIMIT 1
 	</select>
 	
 	<insert id="insertUser" parameterType="SysUser" useGeneratedKeys="true" keyProperty="userId">