diff --git a/History.md b/History.md
index 8de129d..c7976b1 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,7 @@
+# 3.0.9 / 2019-09-23
+* 优化创建数据库/表时的默认配置顶;
+* 优化字段的默认值0的判断
+
 # 3.0.8 / 2019-09-19
 * 修复tableCreate在没有索引时建表失败的bug
 * 更新文档
diff --git a/docs/3.x.md b/docs/3.x.md
index 4c13371..29789f9 100644
--- a/docs/3.x.md
+++ b/docs/3.x.md
@@ -108,7 +108,7 @@ db.tableList().then(list => {
 ### dbCreate(name, options)
 
 * name `<String>` [必传], 数据库名字
-* options `<Object>`, [必传], 数据库的配置
+* options `<Object>`, [选传], 数据库的配置
   - charset `<String>` 默认 utf8mb4
 
 
@@ -133,7 +133,7 @@ db.dbCreate('foo', { charset: 'utf8' }) // 默认是utf8mb4
   - unique `<Boolean>` 是否为 唯一索引
   - default `<Any>` 设置默认值
   - update `<Boolean>` 是否自动更新(只有 datetime & timestamp 可以设)
-* options `<Object>`, [必传], 表的配置
+* options `<Object>`, [选传], 表的配置
   - charset `<String>` 默认 utf8mb4
   - engine `<String>` 默认 InnoDB
 
diff --git a/lib/api.js b/lib/api.js
index adb8a0a..10b6285 100644
--- a/lib/api.js
+++ b/lib/api.js
@@ -124,7 +124,7 @@ class Api {
   }
 
   // 创建新的数据库
-  dbCreate(name, { charset = 'utf8mb4' }) {
+  dbCreate(name, { charset = 'utf8mb4' } = {}) {
     if (!name) {
       return Promise.reject('Empty database name.')
     }
@@ -146,7 +146,7 @@ class Api {
   }
 
   // 创建新的表,
-  tableCreate(name, fields, { charset = 'utf8mb4', engine = 'InnoDB' }) {
+  tableCreate(name, fields, { charset = 'utf8mb4', engine = 'InnoDB' } = {}) {
     if (!name) {
       return Promise.reject('Empty database name.')
     }
diff --git a/lib/method.js b/lib/method.js
index 9c1f584..a8fd1bd 100644
--- a/lib/method.js
+++ b/lib/method.js
@@ -56,9 +56,9 @@ class Method {
    * sql: .filter('name like "foo%" and age > 18')
    * func: .filter(function(){return 'name = "xiaoming"'})
    * obj: .filter({
-   *         name: {$like: 'foo%'}
-   *         age: {$gt: 18}
-   *     })
+   *   name: {$like: 'foo%'}
+   *   age: {$gt: 18}
+   * })
    * obj形式的过滤, 支持多种多样, 详细请看Readme介绍
    */
   filter(val) {
@@ -406,9 +406,7 @@ class Method {
     return this.connect().then(conn => {
       const defer = Promise.defer()
 
-      let sql = `ALTER TABLE ${
-        this.cache.table
-      } ADD ${unique} INDEX \`${name}\` (${opt.field})`
+      let sql = `ALTER TABLE ${this.cache.table} ADD ${unique} INDEX \`${name}\` (${opt.field})`
 
       conn.query(sql, (err, result) => {
         conn.release()
diff --git a/lib/utils.js b/lib/utils.js
index d818547..bec2874 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -237,13 +237,14 @@ const parser = {
       }
       let notnull = it.notnull ? 'NOT NULL' : 'NULL'
 
-      if (/CHAR/.test(it.type)) {
+      if (~it.type.indexOf('CHAR')) {
         it.default = it.default ? escape(it.default) : ''
       }
 
       // 这几种类型,不允许设置默认值
       if (['TEXT', 'BLOB', 'JSON', 'GEOMETRY'].includes(it.type)) {
         notnull = 'NULL'
+        delete it.default
       }
 
       // 这2种类型,如果设置了自动更新时间戳, 则默认值自动改为当前时间戳
@@ -257,10 +258,12 @@ const parser = {
       // 这3种时间类型,不允许设置默认值为 当前时间戳
       if (['TIME', 'DATE', 'YEAR'].includes(it.type)) {
         if (it.default.toUpperCase() === 'CURRENT_TIMESTAMP') {
-          it.default = ''
+          delete it.default
         }
       }
-      defaultVal = it.default ? `DEFAULT ${it.default}` : ''
+      if (it.default || it.default === 0) {
+        defaultVal = 'DEFAULT ' + it.default
+      }
 
       // 非主键下, 设置了unique & index时,都为索引
       if (!it.primary) {
diff --git a/package.json b/package.json
index 50a1a13..4223421 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mysqli",
-  "version": "3.0.8",
+  "version": "3.0.9",
   "description": "MySQL tool",
   "main": "index.js",
   "dependencies": {