diff --git a/g/database/gdb/gdb.go b/g/database/gdb/gdb.go
index 0be4d383e..a718f8c6b 100644
--- a/g/database/gdb/gdb.go
+++ b/g/database/gdb/gdb.go
@@ -97,6 +97,7 @@ type Sql struct {
     Sql   string        // SQL语句(可能带有预处理占位符)
     Args  []interface{} // 预处理参数值列表
     Error error         // 执行结果(nil为成功)
+    Cost  int64         // 执行时间消耗(毫秒)
     Func  string        // 执行方法名称
 }
 
diff --git a/g/database/gdb/gdb_base.go b/g/database/gdb/gdb_base.go
index 137d617fe..d787e9693 100644
--- a/g/database/gdb/gdb_base.go
+++ b/g/database/gdb/gdb_base.go
@@ -16,6 +16,7 @@ import (
     "gitee.com/johng/gf/g/util/gstr"
     "gitee.com/johng/gf/g/util/gconv"
     "gitee.com/johng/gf/g/container/gring"
+    "gitee.com/johng/gf/g/os/gtime"
 )
 
 const (
@@ -68,15 +69,22 @@ func (db *Db) Close() error {
 
 // 数据库sql查询操作，主要执行查询
 func (db *Db) Query(query string, args ...interface{}) (*sql.Rows, error) {
-    p         := db.link.handleSqlBeforeExec(&query)
-    rows, err := db.slave.Query(*p, args ...)
+    var err  error
+    var rows *sql.Rows
+    p := db.link.handleSqlBeforeExec(&query)
     if db.debug.Val() {
+        militime1 := gtime.Millisecond()
+        rows, err  = db.slave.Query(*p, args ...)
+        militime2 := gtime.Millisecond()
         db.sqls.Put(&Sql{
             Sql   : *p,
             Args  : args,
             Error : err,
+            Cost  : militime2 - militime1,
             Func  : "DB:Query",
         })
+    } else {
+        rows, err = db.slave.Query(*p, args ...)
     }
     if err == nil {
         return rows, nil
@@ -88,17 +96,24 @@ func (db *Db) Query(query string, args ...interface{}) (*sql.Rows, error) {
 
 // 执行一条sql，并返回执行情况，主要用于非查询操作
 func (db *Db) Exec(query string, args ...interface{}) (sql.Result, error) {
-    p      := db.link.handleSqlBeforeExec(&query)
-    r, err := db.master.Exec(*p, args ...)
+    var err    error
+    var result sql.Result
+    p := db.link.handleSqlBeforeExec(&query)
     if db.debug.Val() {
+        militime1  := gtime.Millisecond()
+        result, err = db.master.Exec(*p, args ...)
+        militime2  := gtime.Millisecond()
         db.sqls.Put(&Sql{
             Sql   : *p,
             Args  : args,
             Error : err,
+            Cost  : militime2 - militime1,
             Func  : "DB:Exec",
         })
+    } else {
+        result, err = db.master.Exec(*p, args ...)
     }
-    return r, db.formatError(err, p, args...)
+    return result, db.formatError(err, p, args...)
 }
 
 // 格式化错误信息
diff --git a/g/database/gdb/gdb_transaction.go b/g/database/gdb/gdb_transaction.go
index 8ad0f3696..09d0cc94f 100644
--- a/g/database/gdb/gdb_transaction.go
+++ b/g/database/gdb/gdb_transaction.go
@@ -15,6 +15,7 @@ import (
     _ "github.com/go-sql-driver/mysql"
     "gitee.com/johng/gf/g/util/gconv"
     "reflect"
+    "gitee.com/johng/gf/g/os/gtime"
 )
 
 // 数据库事务对象
@@ -35,15 +36,22 @@ func (tx *Tx) Rollback() error {
 
 // (事务)数据库sql查询操作，主要执行查询
 func (tx *Tx) Query(query string, args ...interface{}) (*sql.Rows, error) {
-    p         := tx.db.link.handleSqlBeforeExec(&query)
-    rows, err := tx.tx.Query(*p, args ...)
+    var err  error
+    var rows *sql.Rows
+    p := tx.db.link.handleSqlBeforeExec(&query)
     if tx.db.debug.Val() {
+        militime1 := gtime.Millisecond()
+        rows, err  = tx.tx.Query(*p, args ...)
+        militime2 := gtime.Millisecond()
         tx.db.sqls.Put(&Sql{
             Sql   : *p,
             Args  : args,
             Error : err,
+            Cost  : militime2 - militime1,
             Func  : "TX:Query",
         })
+    } else {
+        rows, err  = tx.tx.Query(*p, args ...)
     }
     if err == nil {
         return rows, nil
@@ -55,17 +63,24 @@ func (tx *Tx) Query(query string, args ...interface{}) (*sql.Rows, error) {
 
 // (事务)执行一条sql，并返回执行情况，主要用于非查询操作
 func (tx *Tx) Exec(query string, args ...interface{}) (sql.Result, error) {
-    p      := tx.db.link.handleSqlBeforeExec(&query)
-    r, err := tx.tx.Exec(*p, args ...)
+    var err    error
+    var result sql.Result
+    p := tx.db.link.handleSqlBeforeExec(&query)
     if tx.db.debug.Val() {
+        militime1  := gtime.Millisecond()
+        result, err = tx.tx.Exec(*p, args ...)
+        militime2  := gtime.Millisecond()
         tx.db.sqls.Put(&Sql{
             Sql   : *p,
             Args  : args,
             Error : err,
+            Cost  : militime2 - militime1,
             Func  : "TX:Exec",
         })
+    } else {
+        result, err = tx.tx.Exec(*p, args ...)
     }
-    return r, tx.db.formatError(err, p, args...)
+    return result, tx.db.formatError(err, p, args...)
 }
 
 // 数据库查询，获取查询结果集，以列表结构返回
diff --git a/geg/database/mysql/gdb_debug.go b/geg/database/mysql/gdb_debug.go
new file mode 100644
index 000000000..ba73a5fd4
--- /dev/null
+++ b/geg/database/mysql/gdb_debug.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+    "fmt"
+    "gitee.com/johng/gf/g/database/gdb"
+)
+
+var db *gdb.Db
+
+// 初始化配置及创建数据库
+func init () {
+    gdb.AddDefaultConfigNode(gdb.ConfigNode {
+       Host    : "127.0.0.1",
+       Port    : "3306",
+       User    : "root",
+       Pass    : "123456",
+       Name    : "test",
+       Type    : "mysql",
+       Role    : "master",
+       Charset : "utf8",
+    })
+    db, _ = gdb.New()
+}
+
+
+func main() {
+    db.SetDebug(true)
+    // 执行3条SQL查询
+    for i := 1; i <= 3; i++ {
+        db.Table("user").Where("uid=?", i).One()
+    }
+    // 构造一条错误查询
+    db.Table("user").Where("no_such_field=?", "just_test").One()
+
+    for k, v := range db.GetQueriedSqls() {
+        fmt.Println(k, ":")
+        fmt.Println("Sql  :", v.Sql)
+        fmt.Println("Args :", v.Args)
+        fmt.Println("Error:", v.Error)
+        fmt.Println("Cost :", v.Cost)
+        fmt.Println("Func :", v.Func)
+    }
+}
\ No newline at end of file