Qual é o equivalente a 'descrever tabela' no SQL Server?

Eu tenho um banco de dados do SQL Server e quero saber quais colunas e tipos ele possui. Eu preferiria fazer isso por meio de uma consulta, em vez de usar uma GUI como o Enterprise Manager. Existe uma maneira de fazer isso?

Você pode usar o procedimento armazenado sp_columns :

exec sp_columns MyTable

Existem alguns métodos para obter metadados sobre uma tabela:

EXEC sp_help tablename

Retornará vários conjuntos de resultados, descrevendo a tabela, suas colunas e restrições.

As INFORMATION_SCHEMAvisualizações fornecerão as informações que você deseja, embora, infelizmente, você precise consultá-las e juntá-las manualmente.

Caso você não queira usar o proc armazenado, aqui está uma versão de consulta simples

select * 
  from information_schema.columns 
 where table_name = 'aspnet_Membership'
 order by ordinal_position

Você pode usar o seguinte

sp_help tablename

Exemplo: sp_help Customer

OU Use atalho

• selecionar tabela, pressione Alt + F1

Exemplo: Cliente Pressione Alt + F1

Use esta consulta

Select * From INFORMATION_SCHEMA.COLUMNS Where TABLE_NAME = 'TABLENAME'

Além das maneiras mostradas em outras respostas, você pode usar

SELECT TOP 0 * FROM table_name

Isso fornecerá o nome de cada coluna sem resultados e será concluído quase instantaneamente com o mínimo de sobrecarga.

Por favor, use a seguinte consulta sql; isso funcionou para o meu caso.

select * FROM   INFORMATION_SCHEMA.Columns where table_name = 'tablename';

Basta selecionar a tabela e pressionar Alt+ F1,

mostrará todas as informações sobre a tabela, como nome da coluna, tipo de dados, chaves etc.

Eu escrevi um sql * mais DESC (RIBE) como select (exibe os comentários da coluna também) no t-sql:

USE YourDB
GO

DECLARE @objectName NVARCHAR(128) = 'YourTable';

SELECT
  a.[NAME]
 ,a.[TYPE]
 ,a.[CHARSET]
 ,a.[COLLATION]
 ,a.[NULLABLE]
 ,a.[DEFAULT]
 ,b.[COMMENTS]
-- ,a.[ORDINAL_POSITION]
FROM
  (
    SELECT
      COLUMN_NAME                                     AS [NAME]
     ,CASE DATA_TYPE
        WHEN 'char'       THEN DATA_TYPE  + '(' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + ')'
        WHEN 'numeric'    THEN DATA_TYPE  + '(' + CAST(NUMERIC_PRECISION AS VARCHAR) + ', ' + CAST(NUMERIC_SCALE AS VARCHAR) + ')'
        WHEN 'nvarchar'   THEN DATA_TYPE  + '(' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + ')'
        WHEN 'varbinary'  THEN DATA_TYPE + '(' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + ')'
        WHEN 'varchar'    THEN DATA_TYPE   + '(' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + ')'
        ELSE DATA_TYPE
      END                                             AS [TYPE]
     ,CHARACTER_SET_NAME                              AS [CHARSET]
     ,COLLATION_NAME                                  AS [COLLATION]
     ,IS_NULLABLE                                     AS [NULLABLE]
     ,COLUMN_DEFAULT                                  AS [DEFAULT]
     ,ORDINAL_POSITION
    FROM   
      INFORMATION_SCHEMA.COLUMNS
    WHERE
      TABLE_NAME = @objectName
  ) a
  FULL JOIN
  (
   SELECT
     CAST(value AS NVARCHAR)                        AS [COMMENTS]
    ,CAST(objname AS NVARCHAR)                      AS [NAME]
   FROM
     ::fn_listextendedproperty ('MS_Description', 'user', 'dbo', 'table', @objectName, 'column', default)
  ) b
  ON a.NAME COLLATE YourCollation = b.NAME COLLATE YourCollation
ORDER BY
  a.[ORDINAL_POSITION];

A seleção acima mencionada pode ser usada em um procedimento armazenado marcado pelo sistema e pode ser chamada de qualquer banco de dados da sua instância de uma maneira simples:

USE master;
GO

IF OBJECT_ID('sp_desc', 'P') IS NOT NULL
  DROP PROCEDURE sp_desc
GO

CREATE PROCEDURE sp_desc (
  @tableName  nvarchar(128)
) AS
BEGIN
  DECLARE @dbName       sysname;
  DECLARE @schemaName   sysname;
  DECLARE @objectName   sysname;
  DECLARE @objectID     int;
  DECLARE @tmpTableName varchar(100);
  DECLARE @sqlCmd       nvarchar(4000);

  SELECT @dbName = PARSENAME(@tableName, 3);
  IF @dbName IS NULL SELECT @dbName = DB_NAME();

  SELECT @schemaName = PARSENAME(@tableName, 2);
  IF @schemaName IS NULL SELECT @schemaName = SCHEMA_NAME();

  SELECT @objectName = PARSENAME(@tableName, 1);
  IF @objectName IS NULL
    BEGIN
      PRINT 'Object is missing from your function call!';
      RETURN;
    END;

  SELECT @objectID = OBJECT_ID(@dbName + '.' + @schemaName + '.' + @objectName);
  IF @objectID IS NULL
    BEGIN
      PRINT 'Object [' + @dbName + '].[' + @schemaName + '].[' + @objectName + '] does not exist!';
      RETURN;
    END;

  SELECT @tmpTableName = '#tmp_DESC_' + CAST(@@SPID AS VARCHAR) + REPLACE(REPLACE(REPLACE(REPLACE(CAST(CONVERT(CHAR, GETDATE(), 121) AS VARCHAR), '-', ''), ' ', ''), ':', ''), '.', '');
  --PRINT @tmpTableName;
  SET @sqlCmd = '
    USE ' + @dbName + '
    CREATE TABLE ' + @tmpTableName + ' (
      [NAME]              nvarchar(128) NOT NULL
     ,[TYPE]              varchar(50)
     ,[CHARSET]           varchar(50)
     ,[COLLATION]         varchar(50)
     ,[NULLABLE]          varchar(3)
     ,[DEFAULT]           nvarchar(4000)
     ,[COMMENTS]          nvarchar(3750));

    INSERT INTO ' + @tmpTableName + '
    SELECT
      a.[NAME]
     ,a.[TYPE]
     ,a.[CHARSET]
     ,a.[COLLATION]
     ,a.[NULLABLE]
     ,a.[DEFAULT]
     ,b.[COMMENTS]
    FROM
      (
        SELECT
          COLUMN_NAME                                     AS [NAME]
         ,CASE DATA_TYPE
            WHEN ''char''      THEN DATA_TYPE + ''('' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + '')''
            WHEN ''numeric''   THEN DATA_TYPE + ''('' + CAST(NUMERIC_PRECISION AS VARCHAR) + '', '' + CAST(NUMERIC_SCALE AS VARCHAR) + '')''
            WHEN ''nvarchar''  THEN DATA_TYPE + ''('' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + '')''
            WHEN ''varbinary'' THEN DATA_TYPE + ''('' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + '')''
            WHEN ''varchar''   THEN DATA_TYPE + ''('' + CAST(CHARACTER_MAXIMUM_LENGTH AS VARCHAR) + '')''
            ELSE DATA_TYPE
          END                                             AS [TYPE]
         ,CHARACTER_SET_NAME                              AS [CHARSET]
         ,COLLATION_NAME                                  AS [COLLATION]
         ,IS_NULLABLE                                     AS [NULLABLE]
         ,COLUMN_DEFAULT                                  AS [DEFAULT]
         ,ORDINAL_POSITION
        FROM   
          INFORMATION_SCHEMA.COLUMNS
        WHERE   
          TABLE_NAME = ''' + @objectName + '''
      ) a
      FULL JOIN
      (
         SELECT
           CAST(value AS NVARCHAR)                        AS [COMMENTS]
          ,CAST(objname AS NVARCHAR)                      AS [NAME]
         FROM
           ::fn_listextendedproperty (''MS_Description'', ''user'', ''' + @schemaName + ''', ''table'', ''' + @objectName + ''', ''column'', default)
      ) b
      ON a.NAME COLLATE Hungarian_CI_AS = b.NAME COLLATE Hungarian_CI_AS
    ORDER BY
      a.[ORDINAL_POSITION];

    SELECT * FROM ' + @tmpTableName + ';'

    --PRINT @sqlCmd;

    EXEC sp_executesql @sqlCmd;
    RETURN;
END;
GO

EXEC sys.sp_MS_marksystemobject sp_desc
GO

Para executar o tipo de procedimento:

EXEC sp_desc 'YourDB.YourSchema.YourTable';

Se você deseja obter uma descrição de um objeto do tipo simples de banco de dados atual (e esquema):

EXEC sp_desc 'YourTable';

Como sp_desc é um procedimento marcado pelo sistema, você também pode deixar o comando exec (também não é recomendado):

sp_desc 'YourTable';

O equivalente do SQL Server ao describecomando do Oracle é o procedimento armazenadosp_help

O describecomando fornece informações sobre os nomes, tipos, comprimento, etc. da coluna.

No SQL Server, digamos que você queira descrever uma tabela 'mytable' no esquema 'myschema' no banco de dados 'mydb', faça o seguinte:

USE mydb;
exec sp_help 'myschema.mytable';

Você pode usar o sp_help 'TableName'

O problema com essas respostas é que você está perdendo as informações principais. Embora isso seja um pouco confuso, esta é uma versão rápida que eu criei para garantir que ela contenha as mesmas informações que o MySQL Describe exibe.

Select SC.name AS 'Field', ISC.DATA_TYPE AS 'Type', ISC.CHARACTER_MAXIMUM_LENGTH AS 'Length', SC.IS_NULLABLE AS 'Null', I.is_primary_key AS 'Key', SC.is_identity AS 'Identity'
From sys.columns AS SC 
LEFT JOIN sys.index_columns AS IC
ON IC.object_id = OBJECT_ID('dbo.Expenses') AND 
IC.column_id = SC.column_id
LEFT JOIN sys.indexes AS I 
ON I.object_id = OBJECT_ID('dbo.Expenses') AND 
IC.index_id = I.index_id
LEFT JOIN information_schema.columns ISC
ON ISC.TABLE_NAME = 'Expenses'
AND ISC.COLUMN_NAME = SC.name
WHERE SC.object_id = OBJECT_ID('dbo.Expenses')

Este é o código que eu uso dentro do EntityFramework Reverse POCO Generator(disponível aqui )

Tabela SQL:

SELECT  c.TABLE_SCHEMA AS SchemaName,
        c.TABLE_NAME AS TableName,
        t.TABLE_TYPE AS TableType,
        c.ORDINAL_POSITION AS Ordinal,
        c.COLUMN_NAME AS ColumnName,
        CAST(CASE WHEN IS_NULLABLE = 'YES' THEN 1
                  ELSE 0
             END AS BIT) AS IsNullable,
        DATA_TYPE AS TypeName,
        ISNULL(CHARACTER_MAXIMUM_LENGTH, 0) AS [MaxLength],
        CAST(ISNULL(NUMERIC_PRECISION, 0) AS INT) AS [Precision],
        ISNULL(COLUMN_DEFAULT, '') AS [Default],
        CAST(ISNULL(DATETIME_PRECISION, 0) AS INT) AS DateTimePrecision,
        ISNULL(NUMERIC_SCALE, 0) AS Scale,
        CAST(COLUMNPROPERTY(OBJECT_ID(QUOTENAME(c.TABLE_SCHEMA) + '.' + QUOTENAME(c.TABLE_NAME)), c.COLUMN_NAME, 'IsIdentity') AS BIT) AS IsIdentity,
        CAST(CASE WHEN COLUMNPROPERTY(OBJECT_ID(QUOTENAME(c.TABLE_SCHEMA) + '.' + QUOTENAME(c.TABLE_NAME)), c.COLUMN_NAME, 'IsIdentity') = 1 THEN 1
                  WHEN COLUMNPROPERTY(OBJECT_ID(QUOTENAME(c.TABLE_SCHEMA) + '.' + QUOTENAME(c.TABLE_NAME)), c.COLUMN_NAME, 'IsComputed') = 1 THEN 1
                  WHEN DATA_TYPE = 'TIMESTAMP' THEN 1
                  ELSE 0
             END AS BIT) AS IsStoreGenerated,
        CAST(CASE WHEN pk.ORDINAL_POSITION IS NULL THEN 0
                  ELSE 1
             END AS BIT) AS PrimaryKey,
        ISNULL(pk.ORDINAL_POSITION, 0) PrimaryKeyOrdinal,
        CAST(CASE WHEN fk.COLUMN_NAME IS NULL THEN 0
                  ELSE 1
             END AS BIT) AS IsForeignKey
FROM    INFORMATION_SCHEMA.COLUMNS c
        LEFT OUTER JOIN (SELECT u.TABLE_SCHEMA,
                                u.TABLE_NAME,
                                u.COLUMN_NAME,
                                u.ORDINAL_POSITION
                         FROM   INFORMATION_SCHEMA.KEY_COLUMN_USAGE u
                                INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
                                    ON u.TABLE_SCHEMA = tc.CONSTRAINT_SCHEMA
                                       AND u.TABLE_NAME = tc.TABLE_NAME
                                       AND u.CONSTRAINT_NAME = tc.CONSTRAINT_NAME
                         WHERE  CONSTRAINT_TYPE = 'PRIMARY KEY') pk
            ON c.TABLE_SCHEMA = pk.TABLE_SCHEMA
               AND c.TABLE_NAME = pk.TABLE_NAME
               AND c.COLUMN_NAME = pk.COLUMN_NAME
        LEFT OUTER JOIN (SELECT DISTINCT
                                u.TABLE_SCHEMA,
                                u.TABLE_NAME,
                                u.COLUMN_NAME
                         FROM   INFORMATION_SCHEMA.KEY_COLUMN_USAGE u
                                INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
                                    ON u.TABLE_SCHEMA = tc.CONSTRAINT_SCHEMA
                                       AND u.TABLE_NAME = tc.TABLE_NAME
                                       AND u.CONSTRAINT_NAME = tc.CONSTRAINT_NAME
                         WHERE  CONSTRAINT_TYPE = 'FOREIGN KEY') fk
            ON c.TABLE_SCHEMA = fk.TABLE_SCHEMA
               AND c.TABLE_NAME = fk.TABLE_NAME
               AND c.COLUMN_NAME = fk.COLUMN_NAME
        INNER JOIN INFORMATION_SCHEMA.TABLES t
            ON c.TABLE_SCHEMA = t.TABLE_SCHEMA
               AND c.TABLE_NAME = t.TABLE_NAME
WHERE c.TABLE_NAME NOT IN ('EdmMetadata', '__MigrationHistory')

Chave estrangeira SQL:

SELECT  FK.name AS FK_Table,
        FkCol.name AS FK_Column,
        PK.name AS PK_Table,
        PkCol.name AS PK_Column,
        OBJECT_NAME(f.object_id) AS Constraint_Name,
        SCHEMA_NAME(FK.schema_id) AS fkSchema,
        SCHEMA_NAME(PK.schema_id) AS pkSchema,
        PkCol.name AS primarykey,
        k.constraint_column_id AS ORDINAL_POSITION
FROM    sys.objects AS PK
        INNER JOIN sys.foreign_keys AS f
            INNER JOIN sys.foreign_key_columns AS k
                ON k.constraint_object_id = f.object_id
            INNER JOIN sys.indexes AS i
                ON f.referenced_object_id = i.object_id
                   AND f.key_index_id = i.index_id
            ON PK.object_id = f.referenced_object_id
        INNER JOIN sys.objects AS FK
            ON f.parent_object_id = FK.object_id
        INNER JOIN sys.columns AS PkCol
            ON f.referenced_object_id = PkCol.object_id
               AND k.referenced_column_id = PkCol.column_id
        INNER JOIN sys.columns AS FkCol
            ON f.parent_object_id = FkCol.object_id
               AND k.parent_column_id = FkCol.column_id
ORDER BY FK_Table, FK_Column

Propriedades estendidas:

SELECT  s.name AS [schema],
        t.name AS [table],
        c.name AS [column],
        value AS [property]
FROM    sys.extended_properties AS ep
        INNER JOIN sys.tables AS t
            ON ep.major_id = t.object_id
        INNER JOIN sys.schemas AS s
            ON s.schema_id = t.schema_id
        INNER JOIN sys.columns AS c
            ON ep.major_id = c.object_id
               AND ep.minor_id = c.column_id
WHERE   class = 1
ORDER BY t.name

usar

SELECT COL_LENGTH('tablename', 'colname')

Nenhuma outra solução funcionou para mim.

Eu gosto deste formato:

name     DataType      Collation             Constraints         PK  FK          Comment

id       int                                 NOT NULL IDENTITY   PK              Order Line Id
pid      int                                 NOT NULL                tbl_orders  Order Id
itemCode varchar(10)   Latin1_General_CI_AS  NOT NULL                            Product Code

Então, eu usei isso:

DECLARE @tname varchar(100) = 'yourTableName';

SELECT  col.name,

        CASE typ.name
            WHEN 'nvarchar' THEN 'nvarchar('+CAST((col.max_length / 2) as varchar)+')'
            WHEN 'varchar' THEN 'varchar('+CAST(col.max_length as varchar)+')'
            WHEN 'char' THEN 'char('+CAST(col.max_length as varchar)+')'
            WHEN 'nchar' THEN 'nchar('+CAST((col.max_length / 2) as varchar)+')'
            WHEN 'binary' THEN 'binary('+CAST(col.max_length as varchar)+')'
            WHEN 'varbinary' THEN 'varbinary('+CAST(col.max_length as varchar)+')'
            WHEN 'numeric' THEN 'numeric('+CAST(col.precision as varchar)+(CASE WHEN col.scale = 0 THEN '' ELSE ','+CAST(col.scale as varchar) END) +')'
            WHEN 'decimal' THEN 'decimal('+CAST(col.precision as varchar)+(CASE WHEN col.scale = 0 THEN '' ELSE ','+CAST(col.scale as varchar) END) +')'
            ELSE typ.name
            END DataType,

        ISNULL(col.collation_name,'') Collation,

        CASE WHEN col.is_nullable = 0 THEN 'NOT NULL ' ELSE '' END + CASE WHEN col.is_identity = 1 THEN 'IDENTITY' ELSE '' END Constraints,

        ISNULL((SELECT 'PK'
                FROM    sys.key_constraints kc INNER JOIN
                        sys.tables tb ON tb.object_id = kc.parent_object_id INNER JOIN
                        sys.indexes si ON si.name = kc.name INNER JOIN
                        sys.index_columns sic ON sic.index_id = si.index_id AND sic.object_id = si.object_id
                WHERE kc.type = 'PK'
                  AND tb.name = @tname
                  AND sic.column_id = col.column_id),'') PK,

        ISNULL((SELECT (SELECT name FROM sys.tables st WHERE st.object_id = fkc.referenced_object_id)
                FROM    sys.foreign_key_columns fkc INNER JOIN
                        sys.columns c ON c.column_id = fkc.parent_column_id AND fkc.parent_object_id = c.object_id INNER JOIN
                        sys.tables t ON t.object_id = c.object_id
                WHERE t.name = tab.name
                  AND c.name = col.name),'') FK,

        ISNULL((SELECT value
                FROM sys.extended_properties
                WHERE major_id = tab.object_id
                  AND minor_id = col.column_id),'') Comment

FROM sys.columns col INNER JOIN
     sys.tables tab ON tab.object_id = col.object_id INNER JOIN
     sys.types typ ON typ.system_type_id = col.system_type_id
WHERE tab.name = @tname
  AND typ.name != 'sysname'
ORDER BY col.column_id;

SELECT C.COLUMN_NAME, C.IS_NULLABLE, C.DATA_TYPE, TC.CONSTRAINT_TYPE, C.COLUMN_DEFAULT
    FROM INFORMATION_SCHEMA.COLUMNS AS C
    FULL JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS CC ON C.COLUMN_NAME = CC.COLUMN_NAME 
    FULL JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS TC ON CC.CONSTRAINT_NAME = TC.CONSTRAINT_NAME
WHERE C.TABLE_NAME = '<Table Name>';

Saída de amostra

Se você estiver usando o FirstResponderKit da equipe Brent Ozar, também poderá executar esta consulta:

exec sp_blitzindex @tablename='MyTable'

Ele retornará todas as informações sobre a tabela:

• índices com suas estatísticas de uso (leituras, gravações, bloqueios, etc.), espaço usado e outros
• índices ausentes
• colunas
• chaves estrangeiras
• conteúdo estatístico

É claro que não é um sistema e nem um stp tão universal como sp_help ou sp_columns , mas retorna todas as informações possíveis sobre a sua tabela e acho que vale a pena criá-la no seu ambiente e mencioná-la aqui.

Basta clicar duas vezes no nome da tabela e pressionar Alt + F1

CREATE PROCEDURE [dbo].[describe] 
( 
@SearchStr nvarchar(max) 
) 
AS 
BEGIN 
SELECT  
    CONCAT([COLUMN_NAME],' ',[DATA_TYPE],' ',[CHARACTER_MAXIMUM_LENGTH],' ', 
    (SELECT CASE [IS_NULLABLE] WHEN 'NO' THEN 'NOT NULL' ELSE 'NULL' END),
    (SELECT CASE WHEN [COLUMN_DEFAULT] IS NULL THEN '' ELSE CONCAT(' DEFAULT ',[COLUMN_DEFAULT]) END)
    ) AS DESCRIPTION
    FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME LIKE @SearchStr
END