生成并导出MySQL数据字典

代码地址： github.com/jayknoxqu/d…

方式一、通过SQL生成数据字典

USE information_schema;
SELECT
	T.TABLE_SCHEMA AS '数据库名称',
	T.TABLE_NAME AS '表名称',
	T.TABLE_COMMENT AS '表说明',
	T.TABLE_TYPE AS '表类型',
	T.ENGINE AS '数据库引擎',
	C.ORDINAL_POSITION AS '序号',
	C.COLUMN_NAME AS '字段名',
	C.COLUMN_TYPE AS '数据类型',
	C.IS_NULLABLE AS '允许为空',
	C.EXTRA AS '自增属性',
	C.CHARACTER_SET_NAME AS '编码名称',
	C.COLUMN_DEFAULT AS '默认值',
	C.COLUMN_COMMENT AS '字段说明' 
FROM
	COLUMNS C
	INNER JOIN TABLES T ON C.TABLE_SCHEMA = T.TABLE_SCHEMA 
	AND C.TABLE_NAME = T.TABLE_NAME 
WHERE
	T.TABLE_SCHEMA = 'websitedev'

生成样例

导出结果

缺点： 排版和样式一团糟，所有表字段全部一个表格里，阅读困难

方式二、通过Python生成数据字典

def generate(database_name):
    """
    生成数据库字典表
    """
    importlib.reload(sys)

    # 使用前修改配置
    conn = mysql.connector.connect(
        host='127.0.0.1',
        port='3306',
        user='root',
        password='123456',
        use_pure=True
    )

    cursor = conn.cursor()

    cursor.execute(
        "SELECT TABLE_NAME, TABLE_COMMENT FROM information_schema.TABLES WHERE table_type='BASE TABLE' AND TABLE_SCHEMA='%s'" % database_name
    )

    tables = cursor.fetchall()

    markdown_table_header = """\n\n\n### %s (%s) \n| 序号 | 字段名称 | 数据类型 | 是否为空 | 字段说明 |\n| :--: |----| ---- | ---- | ---- |\n"""
    markdown_table_row = """| %s | %s | %s | %s | %s |"""

    f = open(database_name + '.md', 'w')

    for table in tables:

        cursor.execute(
            "SELECT ORDINAL_POSITION, COLUMN_NAME, COLUMN_TYPE, IS_NULLABLE, COLUMN_COMMENT "
            "FROM information_schema.COLUMNS WHERE TABLE_SCHEMA='%s' AND TABLE_NAME='%s'" % (
                database_name, table[0]
            )
        )

        tmp_table = cursor.fetchall()
        p = markdown_table_header % (table[0], remove_newline(table[1]))
        for col in tmp_table:
            p += (remove_newline(markdown_table_row % col) + "\n")
        print(p)
        f.writelines(p)

    f.close()

生成样例

通过Python生成的markdown文档，可以使用功能强大的Typora编辑器打开，也可以通过该编辑器生成不同类型的文档

导出结果