请教：动态语句返回并输出一个表中的行数

[icbm]

declare
v_num number;
begin
execute immediate 'select count(*) from tab' into v_num;
dbms_output.put_line(v_num);
end;
/

以上是Oracle中的语句，即查询tab表中的行数，并把此行数（标量）存进v_num变量，并打印输出。

请问在SQL Server中如何写语句？

declare @v_num int
sp_executesql 'select ... from tab' , ???
print @v_num

谢谢。

[百年树人]

declare @v_num int
declare @sql nvarchar(1000)
set @sql=N'select @v_num=count(1) from tb'
exec sp_executesql @sql,N'@v_num int output',@v_num output;
print @v_num

[cjzm83]

declare @v_num int
exec sp_executesql N'select @cnt = count(*) from bs_person' ,N'@cnt int output ',@cnt = @v_num output
print @v_num

[王向飞]

declare @SQLString nvarchar(200)
declare @ParmDefinition nvarchar(200)
/* Build the SQL string one time. */
SET @SQLString =
     N'set @v_num =(SELECT count(1) FROM   TB) ';
/* Specify the parameter format one time. */
SET @ParmDefinition = N'@v_num int output';
/* Execute the string with the first parameter value. */
DECLARE @v_num int;
EXECUTE sp_executesql @SQLString, @ParmDefinition   ,@v_num   output               
/* Execute the same string with the second parameter value. */
select @v_num

[jmsail]

declare @iNum int
declare @strSql nvarchar(max)
set @strSql=N'select @iNum=count(1) from table'
exec sp_executesql ''
print @iNum

[icbm]

to wxf163 (小小菜) 。

谢谢你。不好意思，结贴的时候，你的贴子我还没看到。

[王向飞]