什么是 BULK INSERT
MSDN的解释:
在 SQL Server 中以用户指定的格式将数据文件导入到数据库表或视图中。
语法:
BULK INSERT [ database_name . [ schema_name ] . | schema_name . ] [ table_name | view_name ] FROM 'data_file' [ WITH ( [ [ , ] BATCHSIZE = batch_size ] [ [ , ] CHECK_CONSTRAINTS ] [ [ , ] CODEPAGE = { 'ACP' | 'OEM' | 'RAW' | 'code_page' } ] [ [ , ] DATAFILETYPE = { 'char' | 'native'| 'widechar' | 'widenative' } ] [ [ , ] FIELDTERMINATOR = 'field_terminator' ] [ [ , ] FIRSTROW = first_row ] [ [ , ] FIRE_TRIGGERS ] [ [ , ] FORMATFILE = 'format_file_path' ] [ [ , ] KEEPIDENTITY ] [ [ , ] KEEPNULLS ] [ [ , ] KILOBYTES_PER_BATCH = kilobytes_per_batch ] [ [ , ] LASTROW = last_row ] [ [ , ] MAXERRORS = max_errors ] [ [ , ] ORDER ( { column [ ASC | DESC ] } [ ,...n ] ) ] [ [ , ] ROWS_PER_BATCH = rows_per_batch ] [ [ , ] ROWTERMINATOR = 'row_terminator' ] [ [ , ] TABLOCK ] [ [ , ] ERRORFILE = 'file_name' ] )]
简单应用:
表结构如下:
CREATE TABLE [dbo].[Types] ( [Id] INT IDENTITY (1, 1) NOT NULL, [TypeName] VARCHAR (50) DEFAULT ('') NULL, [TypeValue] INT DEFAULT ((0)) NULL, PRIMARY KEY CLUSTERED ([Id] ASC) );
要导入的文本文件(D:\a.txt)内容如下:
1,Add,1 2,Modify,2 3,Delete,4
导入命令:
BULK INSERT dbo.Types FROM 'D:a.txt' WITH(FIELDTERMINATOR=',')
FIELDTERMINATOR : 表示字段之间的分隔符(默认值为 \t 制表符);
ROWTERMINATOR : 表示行之间的分隔符(默认值为 \r\n 换行符)。
其它参数请参考 MSDN 注解。
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