SqlServer简单的操作XML以及SQl的 try catch等统一格式

Posted 2020-11-30 天天向上518

1：SqlServer简单的操作XML：

 

ALTER PROCEDURE [dbo].[SP_CRM_FranchiseeRecharge_Money]
    @Create_By VARCHAR(50),
    @xmlStr1 NVARCHAR(MAX)  -写在这里面的为 传入的参数
AS
BEGIN  as begin后面的为自定义的变量
    SET NOCOUNT ON;
    DECLARE @xml XML = @xmlStr1;

sqlserver操作XML

     T-SQL提供了以下几个针对XML类型的查询函数：
      query(XQuery)：利用Xquery查询符合条件的元素集合。
      value(XQuery,Type)：利用Xquery查询具体元素的值，Type定义值的类型。
      exist(XQuery)：利用Xquery查询是否存在符合条件的元素。
      nodes(XQuery)：利用Xquery获得一个结果集。



INSERT INTO qqtest(xmlinfo) xmlinfo 为字符串类型
VALUES(
N‘<root>
<person>
<id>F001</id>
<name>F001</name>
<age>18</age>
</person>
</root>‘
)


DECLARE @errorCode INT;
DECLARE @errorMsg VARCHAR(2000);
BEGIN TRY
    SET @errorCode = 0;
    SET @errorMsg = ‘‘;
    DECLARE @xml XML;
    SELECT @xml = xmlinfo
    FROM dbo.qqtest
    WHERE id =6;

    SELECT S.value(‘id[1]‘, ‘varchar(30)‘) id,
           S.value(‘name[1]‘, ‘varchar(30)‘) _Name,
           S.value(‘age[1]‘, ‘varchar(30)‘) age
    FROM @xml.nodes(‘/root/person‘) AS A(S); //B(S) 都是没有问题的   @xml.nodes(‘/root/person‘) AS A(S) 当做一张表来操作了
    SET @errorCode = 200;
END TRY
BEGIN CATCH
    SET @errorCode = 500;
    SET @errorMsg = ERROR_MESSAGE();
    RAISERROR(N‘error：XML文件格式错误：‘, 16, 1,@errorMsg);
    PRINT(@errorMsg)
END CATCH



获取XML数据  ，把XML数据当做一个表格 @xml.nodes(‘/Root/data‘) AS T(S);

select S.value(‘ID[1]‘,‘int‘)as ID, S.value(‘Name[1]‘,‘nvarchar(50)‘)as Name
 FROM @xml.nodes(‘/Root/data‘) AS T(S);

     2 写入临时表
        INSERT INTO #tbCRM_FranchiseeRecharge
        (
            [Recharge_ID],
            [Franchisee_ID],
            [Recharge_Credit],
            [Recharge_Amount]
        )
        SELECT DISTINCT
               NEWID(),
               S.value(‘Franchisee_ID[1]‘, ‘uniqueidentifier‘) AS Franchisee_ID,
               S.value(‘Recharge_Credit[1]‘, ‘int‘) AS Recharge_Credit,
               S.value(‘Recharge_Amount[1]‘, ‘money‘) AS Recharge_Amount
        FROM @xml.nodes(‘/Root/data‘) AS T(S);

 

2：SQl语句简单的 try catch 的统一格式：如下简单的Sql

  string sql = @"BEGIN
                                SET @insertStateCode = 0;
                                IF NOT EXISTS
                                (
                                    SELECT TOP 1
                                           *
                                    FROM tbCRM_Franchisee_Credit_History
                                    WHERE Seq =@rechangeID
                                )          
                                BEGIN TRY
                                    BEGIN TRAN mytran; 
                                    INSERT INTO tbCRM_Franchisee_Credit_History
                                    (
                                        [Seq],
                                        [Franchisee_ID],
                                        [Tran_Code],
                                        [Tran_By],
                                        [Tran_Date],
                                        [Credit],
                                        [Amount],
                                        [Remark]
                                    )
                                    SELECT RM.Recharge_ID,
                                           RM.Franchisee_ID,
                                           5,
                                           RM.Create_By,
                                           GETDATE(),
                                           RM.Recharge_Credit,
                                           RM.Recharge_Amount,
                                           RM.Remark
                                    FROM tbCRM_Franchisee_Recharge_Master RM
                                    WHERE RM.Recharge_ID = @rechangeID;                            
                                    UPDATE tbCRM_Franchisee_Recharge_Master
                                    SET Approve_By = 1
                                    WHERE Recharge_ID =@rechangeID;
                                    SELECT @insertStateCode =200;
                                    COMMIT TRAN mytran;
                                END TRY
                                BEGIN CATCH
                                    SELECT @insertStateCode = 500;
                                    ROLLBACK TRAN mytran;
                                END CATCH;
                            END;";

其实就是简单如下：

BEGIN TRY
    BEGIN TRAN mytran; 

END TRY
BEGIN CATCH
    SELECT @insertStateCode = 500;
      ROLLBACK TRAN mytran;
END CATCH;