09.07 네이버 sns_id 하나에 cust_no에 두개의 sns_id 존재시 오류 건 수정

src/main/java/com/style24/persistence/mybatis/shop/TsfCustomer.xml

@@ -301,7 +301,7 @@
 		     , DATE_FORMAT(C.JOIN_DT, '%Y%m%d%H%i%S')   AS JOIN_DT
 		     , ''                                       AS DORMANT_DT
 		     , (
-		        SELECT DATE_FORMAT(REG_DT, '%Y%m%d%H%i%S')
+		        SELECT DATE_FORMAT(MAX(REG_DT), '%Y%m%d%H%i%S')
 		        FROM   TB_CUSTOMER_SNS
 		        WHERE  CUST_NO = C.CUST_NO
 		        AND    SNS_TYPE = 'NV'
@@ -346,7 +346,7 @@
 		     , ''                                      AS JOIN_DT
 		     , DATE_FORMAT(DC.DORMANT_DT, '%Y%m%d%H%i%S') AS DORMANT_DT
 		     , (
-		        SELECT DATE_FORMAT(REG_DT, '%Y%m%d%H%i%S')
+		        SELECT DATE_FORMAT(MAX(REG_DT), '%Y%m%d%H%i%S')
 		        FROM   TB_CUSTOMER_SNS
 		        WHERE  CUST_NO = DC.CUST_NO
 		        AND    SNS_TYPE = 'NV'