MySQL navicate功能详解

SELECT
	表名 = CASE
WHEN A.colorder = 1 THEN
	D.name
ELSE
	''
END,
 表说明 = CASE
WHEN A.colorder = 1 THEN
	isnull(F. VALUE, '')
ELSE
	''
END,
 字段序号 = A.colorder,
 字段名 = A.name,
 字段说明 = isnull(G.[value], ''),
 标识 = CASE
WHEN COLUMNPROPERTY(A.id, A.name, 'IsIdentity') = 1 THEN
	'√'
ELSE
	''
END,
 主键 = CASE
WHEN EXISTS (
	SELECT
		1
	FROM
		sysobjects
	WHERE
		xtype = 'PK'
	AND parent_obj = A.id
	AND name IN (
		SELECT
			name
		FROM
			sysindexes
		WHERE
			indid IN (
				SELECT
					indid
				FROM
					sysindexkeys
				WHERE
					id = A.id
				AND colid = A.colid
			)
	)
) THEN
	'√'
ELSE
	''
END,
 类型 = B.name,
 占用字节数 = A.Length,
 长度 = COLUMNPROPERTY(A.id, A.name, 'PRECISION'),
 小数位数 = isnull(
	COLUMNPROPERTY(A.id, A.name, 'Scale'),
	0
),
 允许空 = CASE
WHEN A.isnullable = 1 THEN
	'√'
ELSE
	''
END,
 默认值 = isnull(E. TEXT, '')
FROM
	syscolumns A
LEFT JOIN systypes B ON A.xusertype = B.xusertype
INNER JOIN sysobjects D ON A.id = D.id
AND D.xtype = 'U'
AND D.name <> 'dtproperties'
LEFT JOIN syscomments E ON A.cdefault = E.id
LEFT JOIN sys.extended_properties G ON A.id = G.major_id
AND A.colid = G.minor_id
LEFT JOIN sys.extended_properties F ON D.id = F.major_id
AND F.minor_id = 0 --where d.name='OrderInfo'    --如果只查询指定表,加上此条件
ORDER BY
	A.id,
	A.colorder