diff --git a/build.gradle b/build.gradle
index 47705b8..16b4f27 100644
--- a/build.gradle
+++ b/build.gradle
@@ -80,8 +80,11 @@ dependencies {
 
     implementation group: 'org.apache.velocity', name: 'velocity-engine-core', version: '2.3'
 
-    runtimeOnly group: 'com.mysql', name: 'mysql-connector-j', version: '8.4.0'
-
+    // runtimeOnly group: 'com.mysql', name: 'mysql-connector-j', version: '8.4.0'
+	
+	// oracle 드라이버 의존성 추가
+	runtimeOnly 'com.oracle.database.jdbc:ojdbc8:19.20.0.0'
+	
     implementation 'net.bytebuddy:byte-buddy:1.14.5'
 
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'
@@ -150,4 +153,4 @@ war {
 	from('src/main/resources/jeus-web-dd.xml') { into 'WEB-INF' }
     from('src/main/resources/weblogic.xml') { into 'WEB-INF' }
 
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/eactive/apim/portal/config/PortalConfigGatewayDatasource.java b/src/main/java/com/eactive/apim/portal/config/PortalConfigGatewayDatasource.java
index cb33855..f2f6b30 100644
--- a/src/main/java/com/eactive/apim/portal/config/PortalConfigGatewayDatasource.java
+++ b/src/main/java/com/eactive/apim/portal/config/PortalConfigGatewayDatasource.java
@@ -33,21 +33,21 @@ public class PortalConfigGatewayDatasource {
         dataSource.setMaxPoolSize(10);
         dataSource.setMaxIdleTime(60); // seconds
         dataSource.setBorrowConnectionTimeout(30); // seconds
-        dataSource.setTestQuery("SELECT 1");
+        dataSource.setTestQuery("SELECT 1 FROM DUAL");
         dataSource.setMaintenanceInterval(60);
-        dataSource.setXaDataSourceClassName("com.mysql.cj.jdbc.MysqlXADataSource");
+        dataSource.setXaDataSourceClassName("oracle.jdbc.xa.client.OracleXADataSource");
 
         Properties xaProperties = new Properties();
-        xaProperties.setProperty("serverName", gatewayDataSourceProperties.getServerName());
-        xaProperties.setProperty("portNumber", String.valueOf(gatewayDataSourceProperties.getPortNumber()));
-        xaProperties.setProperty("databaseName", gatewayDataSourceProperties.getDatabaseName());
+        String url = String.format("jdbc:oracle:thin:@//%s:%d/%s",
+                gatewayDataSourceProperties.getServerName(),      // HOST
+                gatewayDataSourceProperties.getPortNumber(),      // PORT
+                gatewayDataSourceProperties.getDatabaseName());   // SERVICE_NAME 또는 SID
+                                                              // SID를 사용하는 경우: "jdbc:oracle:thin:@host:port:SID"
+
+        xaProperties.setProperty("URL", url);
         xaProperties.setProperty("user", gatewayDataSourceProperties.getUsername());
         xaProperties.setProperty("password", gatewayDataSourceProperties.getPassword());
-        xaProperties.setProperty("useSSL", "false");
-        xaProperties.setProperty("autoReconnect", "true");
-        xaProperties.setProperty("failOverReadOnly", "false");
-        xaProperties.setProperty("maxReconnects", "3");
-        xaProperties.setProperty("allowPublicKeyRetrieval", "true");
+
         dataSource.setXaProperties(xaProperties);
         return dataSource;
     }
@@ -58,7 +58,7 @@ public class PortalConfigGatewayDatasource {
             @Qualifier("gatewayDataSource") DataSource dataSource) {
         HashMap<String, Object> properties = new HashMap<>();
         //public interface AvailableSettings extends org.hibernate.jpa.AvailableSettings 참고
-        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL8Dialect");
+        properties.put("hibernate.dialect", "org.hibernate.dialect.Oracle12cDialect");
         properties.put("hibernate.connection.handling_mode", "DELAYED_ACQUISITION_AND_RELEASE_AFTER_TRANSACTION");
         properties.put("hibernate.transaction.jta.platform", "org.hibernate.engine.transaction.jta.platform.internal.AtomikosJtaPlatform");
         properties.put("hibernate.physical_naming_strategy", "com.eactive.apim.portal.common.entity.CustomPhysicalNamingStrategy");
diff --git a/src/main/java/com/eactive/apim/portal/config/PortalConfigPortalDatasource.java b/src/main/java/com/eactive/apim/portal/config/PortalConfigPortalDatasource.java
index 2682388..46a50a9 100644
--- a/src/main/java/com/eactive/apim/portal/config/PortalConfigPortalDatasource.java
+++ b/src/main/java/com/eactive/apim/portal/config/PortalConfigPortalDatasource.java
@@ -59,16 +59,9 @@ public class PortalConfigPortalDatasource {
         log.warn("Active profiles: {}", Arrays.toString(env.getActiveProfiles()));
     }
 
-    @Primary
+  @Primary
     @Bean
     public DataSource portalDataSource() {
-        log.warn("Datasource - portal configuration");
-        log.warn("serverName : {}", emsDatasourceProperties.getServerName());
-        log.warn("PortNumber : {}", String.valueOf(emsDatasourceProperties.getPortNumber()));
-        log.warn("DatabaseName : {}", emsDatasourceProperties.getDatabaseName());
-        log.warn("Username : {}", emsDatasourceProperties.getUsername());
-        log.warn("Password : {}", emsDatasourceProperties.getPassword());
-
         AtomikosDataSourceBean dataSource = new AtomikosDataSourceBean();
         dataSource.setBeanName("portalDataSource");
         dataSource.setUniqueResourceName("portalDataSource");
@@ -76,20 +69,20 @@ public class PortalConfigPortalDatasource {
         dataSource.setMaxPoolSize(10);
         dataSource.setMaxIdleTime(60); // seconds
         dataSource.setBorrowConnectionTimeout(30); // seconds
-        dataSource.setTestQuery("SELECT 1");
+        dataSource.setTestQuery("SELECT 1 FROM DUAL");
         dataSource.setMaintenanceInterval(60);
-        dataSource.setXaDataSourceClassName("com.mysql.cj.jdbc.MysqlXADataSource");
+        dataSource.setXaDataSourceClassName("oracle.jdbc.xa.client.OracleXADataSource");
+
         Properties xaProperties = new Properties();
-        xaProperties.setProperty("serverName", emsDatasourceProperties.getServerName());
-        xaProperties.setProperty("portNumber", String.valueOf(emsDatasourceProperties.getPortNumber()));
-        xaProperties.setProperty("databaseName", emsDatasourceProperties.getDatabaseName());
+        String url = String.format("jdbc:oracle:thin:@//%s:%d/%s",
+                emsDatasourceProperties.getServerName(),      // HOST
+                emsDatasourceProperties.getPortNumber(),      // PORT
+                emsDatasourceProperties.getDatabaseName());   // SERVICE_NAME 또는 SID
+                                                              // SID를 사용하는 경우: "jdbc:oracle:thin:@host:port:SID"
+
+        xaProperties.setProperty("URL", url);
         xaProperties.setProperty("user", emsDatasourceProperties.getUsername());
         xaProperties.setProperty("password", emsDatasourceProperties.getPassword());
-        xaProperties.setProperty("useSSL", "false");
-        xaProperties.setProperty("autoReconnect", "true");
-        xaProperties.setProperty("failOverReadOnly", "false");
-        xaProperties.setProperty("maxReconnects", "3");
-        xaProperties.setProperty("allowPublicKeyRetrieval", "true");
 
         dataSource.setXaProperties(xaProperties);
         return dataSource;
@@ -107,7 +100,7 @@ public class PortalConfigPortalDatasource {
         properties.put("hibernate.connection.autocommit", "false");
         properties.put("hibernate.connection.handling_mode", "DELAYED_ACQUISITION_AND_RELEASE_AFTER_TRANSACTION");
         properties.put("hibernate.connection.provider_disables_autocommit", "true");
-        properties.put("hibernate.dialect", "org.hibernate.dialect.MySQL8Dialect");
+        properties.put("hibernate.dialect", "org.hibernate.dialect.Oracle12cDialect");
         properties.put("hibernate.format_sql", "true");
         properties.put("hibernate.physical_naming_strategy", "com.eactive.apim.portal.common.entity.CustomPhysicalNamingStrategy");
         properties.put("hibernate.show_sql", "true");
@@ -120,7 +113,7 @@ public class PortalConfigPortalDatasource {
         // Envers properties org.hibernate.envers.configuration.EnversSettings 참고
         properties.put("org.hibernate.envers.audit_strategy", "org.hibernate.envers.strategy.internal.ValidityAuditStrategy");
         properties.put("org.hibernate.envers.audit_table_suffix", "_AUD");
-        properties.put("org.hibernate.envers.default_catalog", "audit");
+        properties.put("org.hibernate.envers.default_schema", "audit");
         properties.put("org.hibernate.envers.global_with_modified_flag", "true");
         properties.put("org.hibernate.envers.revision_field_name", "REVISION");
         properties.put("org.hibernate.envers.revision_type_field_name", "REVISION_TYPE");