Joana trabalha com extração e consolidação de dados e precisa ter acesso aos metadados de um banco de dados SQL Server para compreender melhor o modelo e as estruturas utilizadas. Para começar, Joana resolveu criar uma consulta SQL que produza uma lista das tabelas, com as respectivas colunas com seus tipos de dados e outras propriedades. O comando que Joana deve usar é:
- A select s1.name tabela, s2.name coluna, s3.name tipo, s2.iscomputed, s2.isnullable from sysobjects s1, syscolumns s2, systypes s3 where s1.xtype='T' and s1.xid=s2.xid and s2.xtype=s3.xtype and s2.xusertype=s3.xusertype order by s1.name, s2.name
- B select s1.name tabela, s2.name coluna, s3.name tipo, s2.iscomputed, s2.isnullable from systables s1, syscolumns s2, systypes s3 where s1.xcode=s2.xcode and s2.xtype=s3.xtype and s2.xusertype=s3.xusertype order by s1.name, s2.name
- C select s1.name tabela, s2.name coluna, s3.name tipo, s3.iscomputed, s3.isnullable from systables s1, syscolumns s2, systypes s3 where s1.tableid=s2.tableid and s2.xtype=s3.xtype and s2.xusertype=s3.xusertype order by s1.name, s2.name
- D select s1.name tabela, s2.name coluna, s3.name tipo, s2.iscomputed, s2.isnullable from sysobjects s1, syscolumns s2, systypes s3 where s1.xtype='U' and s1.id=s2.id and s2.xtype=s3.xtype and s2.xusertype=s3.xusertype order by s1.name, s2.name
- E select s1.name tabela, s2.name coluna, s3.name tipo, s2.iscomputed, s2.isnullable from systables s1, syscolumns s2, sysobjects s3 where s1.xid=s2.xid and s2.xtype=s3.xtype and s2.xusertype=s3.xusertype order by s1.name, s2.name