爲什麼在select語句中使用別名時會被視爲外星人?這個特定的別名SQL列有問題嗎?
我無法想象這是總是如此,但我不得不改變此代碼:
const string query =
@"SELECT C.PLATYPUSCLIENTID, E.DEWDROPNAME FOGGY
FROM DUCKBILLACCOUNT B,
PLATYPUSCLIENT C,
ENTITY E
WHERE B.DUCKBILLNUMBER = :PLATYPUSACCOUNTID
AND B.DUCKBILLACCOUNTABCID = C.DUCKBILLACCOUNTABCID
AND C.PLATYPUSCLIENTABCID = E.ABCID
ORDER BY FOGGY, PLATYPUSCLIENTID";
try {
oc.Open();
using (OracleCommand ocmd = new OracleCommand(query, oc)) {
ocmd.Parameters.Add("PLATYPUSACCOUNTID", PLATYPUSACCOUNTID);
using (OracleDataReader odr = ocmd.ExecuteReader()) {
while (odr.Read()) { . . .
...這樣的:
const string query =
@"SELECT C.PLATYPUSCLIENTID, E.DEWDROPNAME
FROM DUCKBILLACCOUNT B,
PLATYPUSCLIENT C,
ENTITY E
WHERE B.DUCKBILLNUMBER = :PLATYPUSACCOUNTID
AND B.DUCKBILLACCOUNTABCID = C.DUCKBILLACCOUNTABCID
AND C.PLATYPUSCLIENTABCID = E.ABCID
ORDER BY DEWDROPNAME, PLATYPUSCLIENTID";
try {
oc.Open();
using (OracleCommand ocmd = new OracleCommand(query, oc)) {
ocmd.Parameters.Add("PLATYPUSACCOUNTID", PLATYPUSACCOUNTID);
using (OracleDataReader odr = ocmd.ExecuteReader()) {
while (odr.Read()) { . . .
...得到它在運行時返回vals(我在第一個版本中遇到了「IndexOutOfRangeException」)
請問您的查詢是否在SQL Developer中根據需要針對數據庫運行?我記得以前需要使用'AS'關鍵字,但我不記得Oracle SQL引擎是否期望它。 – 2012-07-10 22:09:13
@Jesse:我不知道SQL Developer是什麼,但它在TOAD中運行良好 – 2012-07-10 22:26:28
SQL Developer是Oracle用於數據庫管理的GUI工具。它類似於微軟的SSMS for SQL Server。 http://www.oracle.com/technetwork/developer-tools/sql-developer/overview/index.html – 2012-07-11 14:29:10