在 SQL Server 中将 SELECT 语句的结果导出到文件的方法

exec master..xp_cmdshell
'bcp "SELECT * FROM tablename" queryout "C:/test.txt" -T -c -C 65001'

最后的参数 -T 表示这是信任的连接，也就是说不用输入密码了；-c 表示按字符类型输出；-C 65001 表示输出为 UTF-8 格式，其中 65001 是 UTF-8 的代码页。

bcp usage: bcp {dbtable | query} {in | out | queryout | format} datafile
  [-m maxerrors]            [-f formatfile]          [-e errfile]
  [-F firstrow]             [-L lastrow]             [-b batchsize]
  [-n native type]          [-c character type]      [-w wide character type]
  [-N keep non-text native] [-V file format version] [-q quoted identifier]
  [-C code page specifier]  [-t field terminator]    [-r row terminator]
  [-i inputfile]            [-o outfile]             [-a packetsize]
  [-S server name]          [-U username]            [-P password]
  [-T trusted connection]   [-v version]             [-R regional enable]
  [-k keep null values]     [-E keep identity values]
  [-h "load hints"]         [-x generate xml format file]