SQL总行数

Question

我需要选择行数：

select 
    int_re_usu as Qtd_Respostas 
from 
    tb_questionario_voar_resposta  
group by 
    int_re_usu

它返回：

1- 687
2- 375076
3- 339012
4 -314083
5 -52741
6 -339977
7- 276041
8- 373304
9 - 339476
10- 51095
11- 270365
12 - 6
13 - 308670
14 -305232
15 - 85868
16 - 9893
17 -300598
18 - 300572
19 - 275889
20 - 6092
21 - 80092
22 - 307104
23 -273393

我想选择数字23，即总row_count。

任何想法？

Answer 1

使用@@ RowCount

select int_re_usu as Qtd_Respostas from tb_questionario_voar_resposta  group by int_re_usu
Select @@RowCount

OR 使用派生表

Select Count(*) from 
(select int_re_usu as Qtd_Respostas from tb_questionario_voar_resposta  group by int_re_usu) q1

Answer 2

使用COUNT()：

select COUNT(*) FROM (
    SELECT int_re_usu as Qtd_Respostas 
    from tb_questionario_voar_resposta
    group by int_re_usu
)

Answer 3

您可以使用DISTINCT：

代替GROUP BY

SELECT COUNT(DISTINCT int_re_usu)
FROM tb_questionario_voar_resposta

Answer 4

select count(*) from
( select int_re_usu as Qtd_Respostas from tb_questionario_voar_resposta  group by int_re_usu ) as a

Answer 5

您可以使用计数（*）功能。

select count(*) 
from table_name 
group by column_name

Answer 6

With temp as 
( select int_re_usu as Qtd_Respostas 
  from tb_questionario_voar_resposta  
  group by int_re_usu )

Select count(*) from temp