SQL查看表字段信息如：字段名、字段类型、字段精度、字段大小、索引、主键等

表名、字段名、字段类型、字段精度、字段大小

SQL：

use [test] -- 修改库名
SELECT t.table_name, -- 表名
       c.column_name, -- 字段名
        c.data_type, -- 字段类型
        c.numeric_precision, -- 字段精度
        ISNULL(CHARACTER_MAXIMUM_LENGTH,0) AS SIZE -- 字段大小
FROM INFORMATION_SCHEMA.TABLES AS t 
INNER JOIN INFORMATION_SCHEMA.COLUMNS c ON
    (t.table_name = c.table_name)
WHERE t.table_name = '%s' -- 修改表名
ORDER BY t.table_name

案例：

字段名、是否为主键、字段类型、字段大小、索引名

SQL：

use [test] -- 修改库名
SELECT 
    ColumnName=C.name,
    PrimaryKey=ISNULL(IDX.PrimaryKey,N''),
    Type=T.name,
    Length=C.max_length,
    IndexName=ISNULL(IDX.IndexName,N'')
FROM sys.columns C
    INNER JOIN sys.objects O
        ON C.[object_id]=O.[object_id]
            AND O.type='U'
            AND O.is_ms_shipped=0
    INNER JOIN sys.types T
        ON C.user_type_id=T.user_type_id
 LEFT JOIN                       -- 索引及主键信息
    (
        SELECT 
            IDXC.[object_id],
            IDXC.column_id,
            Sort=CASE INDEXKEY_PROPERTY(IDXC.[object_id],IDXC.index_id,IDXC.index_column_id,'IsDescending')
                WHEN 1 THEN 'DESC' WHEN 0 THEN 'ASC' ELSE '' END,
            PrimaryKey=CASE WHEN IDX.is_primary_key=1 THEN N'√'ELSE N'' END,
            IndexName=IDX.Name
        FROM sys.indexes IDX
        INNER JOIN sys.index_columns IDXC
            ON IDX.[object_id]=IDXC.[object_id]
                AND IDX.index_id=IDXC.index_id
        INNER JOIN  -- 对于一个列包含多个索引的情况,只显示第1个索引信息
        (
            SELECT [object_id], Column_id, index_id=MIN(index_id)
            FROM sys.index_columns
            GROUP BY [object_id], Column_id
        ) IDXCUQ
            ON IDXC.[object_id]=IDXCUQ.[object_id]
                AND IDXC.Column_id=IDXCUQ.Column_id
                AND IDXC.index_id=IDXCUQ.index_id
    ) IDX
        ON C.[object_id]=IDX.[object_id]
            AND C.column_id=IDX.column_id
WHERE O.name=N'UTIL_IP'       -- 修改表名
ORDER BY O.name,C.column_id

案例：