代码生成器Sql Server 和 Mysql 数据库脚本
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#SQL SERVER
private string SqlTableList = @"SELECT
so.name,
Convert( VARCHAR(10), ep.[value]) AS [description]
FROM
sysobjects so(NOLOCK)
LEFT JOIN sys.extended_properties ep(NOLOCK) ON ep.major_id=so.id AND ep.minor_id=0
WHERE
so.[type]=‘U‘ AND so.name<>‘sysdiagrams‘
ORDER BY
so.name";
private string SqlFieldList = @"SELECT
c.name,
t.name AS [type],
c.length AS maxLength,
c.isnullable AS isNullable,
(
SELECT COUNT(1) FROM sys.identity_columns ic(NOLOCK) WHERE ic.[object_id]=c.id AND ic.column_id=c.colid
) AS isIdentity,
(
SELECT VALUE FROM sys.extended_properties ep(NOLOCK) WHERE ep.major_id = c.id AND ep.minor_id=c.colid
) AS [description],
[IsPk]=CASE WHEN EXISTS (SELECT 1 FROM sysobjects WHERE xtype=‘PK‘ and parent_obj=c.id and name IN (
SELECT name FROM sysindexes WHERE indid in(SELECT indid FROM sysindexkeys WHERE id = c.id AND colid=c.colid))) THEN 1 ELSE 0 END
FROM
syscolumns c(NOLOCK)
INNER JOIN sys.tables ts(NOLOCK) ON ts.[object_id] = c.id
INNER JOIN sys.types t(NOLOCK) ON t.system_type_id=c.xtype
INNER JOIN systypes st(NOLOCK) ON st.name=t.name AND st.name<>‘sysname‘
INNER JOIN sysusers su(NOLOCK) ON st.uid=su.uid AND su.name=‘sys‘
--INNER JOIN syscolumns s(NOLOCK) ON c.[object_id]=s.id
WHERE
ts.name=‘{0}‘
ORDER BY
c.id ASC";
#MySQL
private string SqlTableList_MySql = @"SELECT
TABLE_NAME as name,
TABLE_COMMENT as description
FROM
information_schema.TABLES
WHERE
TABLE_SCHEMA=‘{0}‘";
private string SqlFieldList_MySql = @"SELECT
COLUMN_NAME as name,
DATA_TYPE as type,
IFNULL(CHARACTER_MAXIMUM_LENGTH,0) as maxLength,
(CASE IS_NULLABLE WHEN ‘NO‘ THEN 0 ELSE 1 END) as isNullable,
as isIdentity,
COLUMN_COMMENT as description,
(CASE COLUMN_KEY WHEN ‘PRI‘ THEN 1 ELSE 0 END) as IsPk
FROM
information_schema.COLUMNS
WHERE
TABLE_SCHEMA=‘{0}‘
AND TABLE_NAME=‘{1}‘
ORDER BY
ORDINAL_POSITION ASC";
#endregion
原文：http://my.oschina.net/hnqingping1255/blog/423115
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