SQL Server中数据行批量插入脚本的存储实现

 IF OBJECT_ID(N'dbo.usp_GetInsertSQL', 'P') IS NOT NULL
 BEGIN
  DROP PROCEDURE dbo.usp_GetInsertSQL;
 END
 GO
 --==================================
 -- 功能: 获取数据表记录插入的SQL脚本
 -- 说明: 具体实现阐述 
 -- 作者: XXX
 -- 创建: yyyy-MM-dd
 -- 修改: yyyy-MM-dd XXX 修改内容描述
 --==================================
 CREATE PROCEDURE dbo.usp_GetInsertSQL 
 (
  @chvnTable NVARCHAR(),   -- 数据表名称(建议只使用表名称，不要带有分隔符[])
  @chvnWhere NVARCHAR() = N'', -- where查询条件(不带WHERE关键字）
  @bitIsSingleRow BIT =     -- 是否单行模式，默认为单行模式(单行模式为单行INSERT INTO VALUES格式；非单行模式（多行模式）为多行INSERT INTO SELECT格式)
 )
  --$Encode$--
 AS
 BEGIN
  SET NOCOUNT ON;
  SET @bitIsSingleRow = ISNULL(@bitIsSingleRow, );
  DECLARE
   @intTableID AS INT,
   @chvnSchemaTableName NVARCHAR();/格式[schema].[table]--++++++（各部分对应字符数）/
  SELECT
   @intTableID = ,
   @chvnSchemaTableName = N'';
  SELECT
   @intTableID = object_id
   ,@chvnSchemaTableName = QUOTENAME(SCHEMA_NAME(schema_id)) + N'.' + QUOTENAME(@chvnTable) /组合架构名称和表名称的连接/
  FROM sys.objects
  WHERE name = @chvnTable
   AND type = 'U';
  DECLARE
   @chvnColumnNames NVARCHAR(),    -- 字段列名集，多个以逗号','分隔，格式如[column_name],[column_name],...
   @chvnColumnValues AS NVARCHAR(MAX);    -- 字段列值集，多个以逗号','分隔 
  DECLARE 
   @chvnTSQL AS NVARCHAR(MAX),      -- TSQL脚本变量
   @chvnInsertIntoBoday AS NVARCHAR();   -- InsertInto主体变量
  SELECT
   @chvnTSQL = N'',
   @chvnInsertIntoBoday = N'';
  SELECT
   @chvnColumnNames = ISNULL(@chvnColumnNames + N',', N'') + QUOTENAME(T.column_name)
   ,@chvnColumnValues = ISNULL(@chvnColumnValues + N' + '','' + ', N'') + CAST(T.column_value AS NVARCHAR())
  FROM (SELECT 
     name AS column_name /字段列名/
     /字段列值/
     ,column_value = CASE
      WHEN system_type_id IN (, , , , , , , , , , ) /数字数据类型整数数据类型(bit、tinyint、smallint、int、bigint)，带精度和小数的数据类型(decimal、numeric)和货币数据类型（monery和smallmoney/       
        THEN 'CASE WHEN '+ name + ' IS NULL THEN ''NULL'' ELSE CAST(' + name + ' AS VARCHAR) END'
      WHEN system_type_id IN (, , , , ) /日期和时间数据类型datetime、smalldatetime（兼容sql server 新增 date、datetime和time）/
        THEN 'CASE WHEN '+ name + ' IS NULL THEN ''NULL'' ELSE '''''''' + REPLACE(CONVERT(VARCHAR(), ' + name + ', ), '' ::.'', '''') + '''''''' END'
      WHEN system_type_id IN () /字符串数据类型varchar/
        THEN 'CASE WHEN '+ name + ' IS NULL THEN ''NULL'' ELSE '''''''' + REPLACE(' + name + ', '''''''', '''''''''''') + '''''''' END'
      WHEN system_type_id IN () /Unicode字符串数据类型nvarchar/
        THEN 'CASE WHEN '+ name + ' IS NULL THEN ''NULL'' ELSE ''N'''''' + REPLACE(' + name + ', '''''''','''''''''''') + '''''''' END'
      WHEN system_type_id IN () /字符串数据类型char/
        THEN 'CASE WHEN '+ name + ' IS NULL THEN ''NULL'' ELSE '''''''' + CAST(REPLACE(' + name + ', '''''''' ,'''''''''''') AS CHAR(' + CAST(max_length AS VARCHAR) + ')) + '''''''' END'
      WHEN system_type_id IN () /nicode字符串数据类型nchar/
        THEN 'CASE WHEN '+ name + ' IS NULL THEN ''NULL'' ELSE ''N'''''' + CAST(REPLACE(' + name + ', '''''''' ,'''''''''''') AS CHAR(' + CAST(max_length AS VARCHAR) + ')) + '''''''' END'
      ELSE '''NULL''' END
    FROM sys.columns 
    WHERE object_id = @intTableID
  ) AS T;
  SET @chvnInsertIntoBoday = N'''INSERT INTO '+ @chvnSchemaTableName + N' (' + @chvnColumnNames + N')'''; 
  -- 方式一、代码格式使用了GOTO和Label
  --BEGIN
  -- IF @bitIsSingleRow = /多行模式/
  -- BEGIN 
  --  SET @chvnTSQL = N'SELECT ''SELECT '' + ' + @chvnColumnValues + ' AS RowData, ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) AS RowNum FROM ' + @chvnSchemaTableName
 
  --  -- 此处不能使用GOTO WhereCondition;,因为之后的代码不会被执行
  --  IF @chvnWhere > ''
  --  BEGIN
  --   SET @chvnTSQL = @chvnTSQL + ' WHERE ' + @chvnWhere;
  --  END
  --  -- 处理多行模式，需要使用ROW_NUMBER窗口函数  
  --  SET @chvnTSQL = N'SELECT CASE WHEN T.rownum = THEN REPLICATE(N'' '', LEN(N''UNION ALL '') + ) + T.RowData ELSE N''UNION ALL '' + T.RowData END' +
  --      N' FROM (' + @chvnTSQL + N') AS T';
  --  SET @chvnTSQL = N'SELECT '+ @chvnInsertIntoBoday + N';' +
  --      @chvnTSQL;
  --  GOTO MultiRow;
  -- END
  -- ELSE IF @bitIsSingleRow = /当行模式/
  -- BEGIN
  --  SET @chvnTSQL = N'SELECT ' + @chvnInsertIntoBoday + 
  --      N' + ''VALUES('' + ' + @chvnColumnValues + ' + '');'' FROM ' + @chvnSchemaTableName;
  --  GOTO WhereCondition;
  -- END
  -- -- where查询条件
  -- WhereCondition:
  -- IF @chvnWhere > ''
  -- BEGIN
  --  SET @chvnTSQL = @chvnTSQL + ' WHERE ' + @chvnWhere;
  -- END
 
  -- MultiRow:/多行模式GOTO的Label空标记/
  --END
  -- 方式二、存在部分代码的冗余
  BEGIN
   IF @bitIsSingleRow = /多行模式/
   BEGIN 
    SET @chvnTSQL = N'SELECT ''SELECT '' + ' + @chvnColumnValues + ' AS RowData, ROW_NUMBER() OVER(ORDER BY (SELECT NULL)) AS RowNum FROM ' + @chvnSchemaTableName 
    IF @chvnWhere > ''
    BEGIN
     SET @chvnTSQL = @chvnTSQL + ' WHERE ' + @chvnWhere;
    END
    -- 多行模式特殊代码，需要使用ROW_NUMBER窗口函数 
    SET @chvnTSQL = N'SELECT CASE WHEN T.rownum = THEN REPLICATE(N'' '', LEN(N''UNION ALL '') + ) + T.RowData ELSE N''UNION ALL '' + T.RowData END' +
        N' FROM (' + @chvnTSQL + N') AS T';
    SET @chvnTSQL = N'SELECT '+ @chvnInsertIntoBoday + N';' +
        @chvnTSQL;
   END
   ELSE IF @bitIsSingleRow = /单行模式/
   BEGIN
    SET @chvnTSQL = N'SELECT ' + @chvnInsertIntoBoday + 
        N' + ''VALUES('' + ' + @chvnColumnValues + ' + '');'' FROM ' + @chvnSchemaTableName;
    IF @chvnWhere > ''
    BEGIN
     SET @chvnTSQL = @chvnTSQL + ' WHERE ' + @chvnWhere;
    END
   END
  END
  PRINT @chvnTSQL;  
  EXEC(@chvnTSQL);
 END
 GO 

 IF OBJECT_ID(N'dbo.UserLoginInfo', N'U') IS NOT NULL
 BEGIN
  DROP TABLE dbo.UserLoginInfo;
 END
 GO
 -- create testing table UserLoginInfo
 CREATE TABLE dbo.UserLoginInfo (
  ID INT IDENTITY(, ) PRIMARY KEY,
  Name VARCHAR() NOT NULL,
  LoginTime DATETIME NOT NULL
 );
 GO
 -- insert testing data
 INSERT dbo.UserLoginInfo (Name, LoginTime) VALUES 
 ('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::')
 ,('zhang', '-- ::')
 ,('li', '-- ::')
 ,('wang', '-- ::');
 GO 
 
先测试单行模式的效果，相应的T-SQL代码如下
 
 EXEC dbo.usp_GetInsertSQL
  @chvnTable = N'UserLoginInfo',   -- nvarchar()
  @chvnWhere = N'',      -- nvarchar()
  @bitIsSingleRow = ;     -- bit
 GO 

 EXEC dbo.usp_GetInsertSQL
  @chvnTable = N'UserLoginInfo',   -- nvarchar()
  @chvnWhere = N'',      -- nvarchar()
  @bitIsSingleRow = ;     -- bit
 GO