如何将下列用于SQL SERVER的语句转为oracle可用的?SELECT FieldName = a.name,isMainKey = 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 '1' else '0' end,FieldType = b.name,(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then 1 else 0 end) as IsIdentity 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 sysproperties g on a.id=g.id and a.colid=g.smallid left join sysproperties f on d.id=f.id and f.smallid=0 where d.name='Tb_student' order by a.id,a.colorder
不同的类型是不同的东西
TO 楼上的兄弟,就是因为复杂所以才要高手进啊!!!!我把问题再描述一下吧:
假如给定了一个表名,上面假设给的表名是'Tb_student'
要把这个表中的所有字段的类型、名称、是否为主键、是否唯一 这四个项找出来
樓主真是個Oracle新手.
user_tab_columns
user_indexes
USER_IND_COLUMNS
string strSQL = "select a.COLUMN_NAME, a.DATA_TYPE, a.DATA_SCALE, b.COMMENTS FROM USER_TAB_COLUMNS a, USER_COL_COMMENTS b ";
strSQL += " where a.TABLE_NAME ='" + strTableName.ToUpper() + "'";
strSQL += " and b.TABLE_NAME = '" + strTableName.ToUpper() + "'";
strSQL += " and a.COLUMN_NAME = b.COLUMN_NAME"; string strcon = "data source=" + this.strDBName + ";user id=" + this.strDBUser + ";password=" + this.strDBPWD + "";
System.Data.OracleClient.OracleDataAdapter sda = new OracleDataAdapter(strSQL, strcon);
sda.Fill(dt);
sda.Dispose();
return dt;