SQL Server 中的 %Rowtype 等效項

Question

我即將將存儲過程從 pl/sql 轉換為 SQL Server。 該過程使用游標循環select查詢的結果。 是否有與 ORACLE rowtype構造等效的 SQL Server？

Answer 1

與 oracle 相比，這是不喜歡 SQL Server 的一個重要原因。

我很失望 SS 沒有 %TYPE 和 %ROWTYPE。 這些在最初編寫代碼時節省了數小時的工作時間，並且在需要更改列類型的情況下，它不必返回並重新編寫所有代碼。

在 Oracle 中，我曾經寫過類似的東西：

將@MyRowVar 聲明為 ATable%ROWTYPE；

在 SQL Server 中，我只需要這樣寫：

DECLARE @External_ID                AS BIGINT = NULL;
DECLARE @PlatformID                 AS INT = NULL;
DECLARE @ActorIDOfReseller          AS INT = NULL;
DECLARE @ActorIDOfClient            AS INT = NULL;
DECLARE @ActorIDOfExtension         AS INT = NULL;
DECLARE @CallType                   AS NCHAR (10) = NULL;
DECLARE @CallInitiatedDate          AS DATE = NULL;
DECLARE @CallInitiatedTimeHH24MI    AS TIME (0) = NULL;
DECLARE @TimePeriodID               AS INT = NULL;
DECLARE @CallAnswered               AS DATETIME = NULL;
DECLARE @CallAnsweredYN             AS BIT = NULL;
DECLARE @CallDispositionID          AS INT = NULL;
DECLARE @CountryID                  AS INT = NULL;
DECLARE @CallPrefixID               AS INT = NULL;
DECLARE @FromNumber                 AS VARCHAR (32) = NULL;
DECLARE @ToNumber                   AS VARCHAR (80) = NULL;
DECLARE @CallDuration               AS INT = NULL;
DECLARE @CallCostToExtension        AS DECIMAL (10, 6) = NULL;
DECLARE @CallCostToClient           AS DECIMAL (10, 6) = NULL;
DECLARE @CallCostToReseller         AS DECIMAL (10, 6) = NULL;
DECLARE @CallCostToAdmin            AS DECIMAL (10, 6) = NULL;
DECLARE @Flow                       AS VARCHAR (3) = NULL;
DECLARE @CallStart                  AS DATETIME = NULL;
DECLARE @MoneyUnit                  AS VARCHAR (32) = NULL;
DECLARE @Prefix                     AS VARCHAR (32) = NULL;
DECLARE @External_CallID            AS VARCHAR (255) = NULL;

這讓我非常難過。

哈維

Answer 2

使用游標的SQL方式如下圖

DECLARE @colA varchar(50), @colB varchar(50)

DECLARE myCursor CURSOR FOR
Select columnA, columnB From table

OPEN myCursor

FETCH NEXT FROM myCursor INTO @colA, @colB

WHILE @@FETCH_STATUS = 0
BEGIN

--do something with @colA and @colB

FETCH NEXT FROM myCursor INTO @colA, @colB

END

CLOSE myCursor
DEALLOCATE myCursor

參考鏈接

Answer 3

正如@HarveyFrench回應的那樣，沒有@rowtype 。 要生成所有列變量，您可以使用此選擇並從結果中復制粘貼：

SELECT 'DECLARE @customPrefix' + COLUMN_NAME  + '  ' +  DATA_TYPE + ';'
FROM INFORMATION_SCHEMA.COLUMNS
WHERE 
TABLE_NAME = 'Your_table'