diff --git a/orm/db_alias.go b/orm/db_alias.go
index 79576b8e..b6c833a7 100644
--- a/orm/db_alias.go
+++ b/orm/db_alias.go
@@ -59,6 +59,7 @@ var (
 		"postgres": DRPostgres,
 		"sqlite3":  DRSqlite,
 		"tidb":     DRTiDB,
+		"oracle":   DROracle,
 	}
 	dbBasers = map[DriverType]dbBaser{
 		DRMySQL:    newdbBaseMysql(),
@@ -151,7 +152,7 @@ func detectTZ(al *alias) {
 			al.Engine = "INNODB"
 		}
 
-	case DRSqlite:
+	case DRSqlite, DROracle:
 		al.TZ = time.UTC
 
 	case DRPostgres:
diff --git a/orm/db_oracle.go b/orm/db_oracle.go
index 1e385c9a..deca36ad 100644
--- a/orm/db_oracle.go
+++ b/orm/db_oracle.go
@@ -14,6 +14,41 @@
 
 package orm
 
+import (
+	"fmt"
+	"strings"
+)
+
+// oracle operators.
+var oracleOperators = map[string]string{
+	"exact":       "= ?",
+	"gt":          "> ?",
+	"gte":         ">= ?",
+	"lt":          "< ?",
+	"lte":         "<= ?",
+	"//iendswith": "LIKE ?",
+}
+
+// oracle column field types.
+var oracleTypes = map[string]string{
+	"pk":              "NOT NULL PRIMARY KEY",
+	"bool":            "bool",
+	"string":          "VARCHAR2(%d)",
+	"string-text":     "VARCHAR2(%d)",
+	"time.Time-date":  "DATE",
+	"time.Time":       "TIMESTAMP",
+	"int8":            "INTEGER",
+	"int16":           "INTEGER",
+	"int32":           "INTEGER",
+	"int64":           "INTEGER",
+	"uint8":           "INTEGER",
+	"uint16":          "INTEGER",
+	"uint32":          "INTEGER",
+	"uint64":          "INTEGER",
+	"float64":         "NUMBER",
+	"float64-decimal": "NUMBER(%d, %d)",
+}
+
 // oracle dbBaser
 type dbBaseOracle struct {
 	dbBase
@@ -27,3 +62,35 @@ func newdbBaseOracle() dbBaser {
 	b.ins = b
 	return b
 }
+
+// OperatorSQL get oracle operator.
+func (d *dbBaseOracle) OperatorSQL(operator string) string {
+	return oracleOperators[operator]
+}
+
+// DbTypes get oracle table field types.
+func (d *dbBaseOracle) DbTypes() map[string]string {
+	return oracleTypes
+}
+
+//ShowTablesQuery show all the tables in database
+func (d *dbBaseOracle) ShowTablesQuery() string {
+	return "SELECT TABLE_NAME FROM USER_TABLES"
+}
+
+// Oracle
+func (d *dbBaseOracle) ShowColumnsQuery(table string) string {
+	return fmt.Sprintf("SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS "+
+		"WHERE TABLE_NAME ='%s'", strings.ToUpper(table))
+}
+
+// check index is exist
+func (d *dbBaseOracle) IndexExists(db dbQuerier, table string, name string) bool {
+	row := db.QueryRow("SELECT COUNT(*) FROM USER_IND_COLUMNS, USER_INDEXES "+
+		"WHERE USER_IND_COLUMNS.INDEX_NAME = USER_INDEXES.INDEX_NAME "+
+		"AND  USER_IND_COLUMNS.TABLE_NAME = ? AND USER_IND_COLUMNS.INDEX_NAME = ?", strings.ToUpper(table), strings.ToUpper(name))
+
+	var cnt int
+	row.Scan(&cnt)
+	return cnt > 0
+}