diff --git a/ruoyi-system/src/main/resources/mapper/system/SysConfigMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysConfigMapper.xml
index 4756c1f18..068128bc1 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysConfigMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysConfigMapper.xml
@@ -61,7 +61,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
     
     <select id="checkConfigKeyUnique" parameterType="String" resultMap="SysConfigResult">
         <include refid="selectConfigVo"/>
-        where config_key = #{configKey}
+        where config_key = #{configKey} limit 1
     </select>
     
     <insert id="insertConfig" parameterType="SysConfig">
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
index bb018a730..24a004162 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
@@ -65,7 +65,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkDeptNameUnique" resultMap="SysDeptResult">
 	    <include refid="selectDeptVo"/>
-		where dept_name=#{deptName} and parent_id = #{parentId}
+		where dept_name=#{deptName} and parent_id = #{parentId} limit 1
 	</select>
 
 	<select id="selectDeptById" parameterType="Long" resultMap="SysDeptResult">
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysDictTypeMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysDictTypeMapper.xml
index 1ddabe6ef..15774940c 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysDictTypeMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysDictTypeMapper.xml
@@ -57,7 +57,7 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkDictTypeUnique" parameterType="String" resultMap="SysDictTypeResult">
 		<include refid="selectDictTypeVo"/>
-		where dict_type = #{dictType}
+		where dict_type = #{dictType} limit 1
 	</select>
 	
 	<delete id="deleteDictTypeById" parameterType="Long">
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysMenuMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysMenuMapper.xml
index 9a06fde16..e7228e89a 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysMenuMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysMenuMapper.xml
@@ -123,7 +123,7 @@
 
 	<select id="checkMenuNameUnique" parameterType="SysMenu" resultMap="SysMenuResult">
 		<include refid="selectMenuVo"/>
-		where menu_name=#{menuName} and parent_id = #{parentId}
+		where menu_name=#{menuName} and parent_id = #{parentId} limit 1
 	</select>
 
 	<update id="updateMenu" parameterType="SysMenu">
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysPostMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysPostMapper.xml
index 8b0c0292c..7aaa5a6a0 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysPostMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysPostMapper.xml
@@ -56,12 +56,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkPostNameUnique" parameterType="String" resultMap="SysPostResult">
 		<include refid="selectPostVo"/>
-		 where post_name=#{postName}
+		 where post_name=#{postName} limit 1
 	</select>
 	
 	<select id="checkPostCodeUnique" parameterType="String" resultMap="SysPostResult">
 		<include refid="selectPostVo"/>
-		 where post_code=#{postCode}
+		 where post_code=#{postCode} limit 1
 	</select>
 	
  	<delete id="deletePostByIds" parameterType="Long">
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysRoleMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysRoleMapper.xml
index 8d810c395..1cac069d3 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysRoleMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysRoleMapper.xml
@@ -70,12 +70,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	
 	<select id="checkRoleNameUnique" parameterType="String" resultMap="SysRoleResult">
 		<include refid="selectRoleVo"/>
-		 where r.role_name=#{roleName}
+		 where r.role_name=#{roleName} limit 1
 	</select>
 	
 	<select id="checkRoleKeyUnique" parameterType="String" resultMap="SysRoleResult">
 		<include refid="selectRoleVo"/>
-		 where r.role_key=#{roleKey}
+		 where r.role_key=#{roleKey} limit 1
 	</select>
 	
 	<delete id="deleteRoleById" parameterType="Long">
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysUserMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysUserMapper.xml
index b02bd3fdb..d5f3c3e70 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysUserMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysUserMapper.xml
@@ -134,15 +134,15 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="checkLoginNameUnique" parameterType="String" resultType="int">
-		select count(1) from sys_user where login_name=#{loginName}
+		select count(1) from sys_user where login_name=#{loginName} limit 1
 	</select>
 	
 	<select id="checkPhoneUnique" parameterType="String" resultMap="SysUserResult">
-		select user_id, phonenumber from sys_user where phonenumber=#{phonenumber}
+		select user_id, phonenumber from sys_user where phonenumber=#{phonenumber} limit 1
 	</select>
 	
 	<select id="checkEmailUnique" parameterType="String" resultMap="SysUserResult">
-		select user_id, email from sys_user where email=#{email}
+		select user_id, email from sys_user where email=#{email} limit 1
 	</select>
 	
 	<select id="selectUserById" parameterType="Long" resultMap="SysUserResult">