sql | 需要查询来过滤数据

Question

I have this dataset where i need to figure out, For which account there is both a -ve and a +ve amount for a given date through out the month.

also to display these accounts with respective amount and date

Date  acct   amt 
x      123   -1.1
x      123    2.3
y      234    1.4
y      234    1.5
y      234   -4.3
z      345    8.2
z      345    1.3

your help is much appreciated.

EDIT:

Select date, acct, amt 
from table_name 
where date between 'x' and 'z' 
order by date, acct; 

now i can see the data like i have shown above but i am not able to figure out what to use to move forward.

expected result (account with z date is gone as it had both +ve transactions):

Date  acct   amt 
x      123   -1.1
x      123    2.3
y      234    1.4
y      234    1.5
y      234   -4.3

Answer 1

SqlFiddleDemo

You decide what you want to do with 0

SELECT Table1.*
FROM Table1
JOIN 
    (
    SELECT "Date", "acct"
    FROM Table1 
    GROUP BY "Date", "acct"
    HAVING 
        MIN("amt") < 0
    AND MAX("amt") > 0
    ) T
  ON Table1."Date" = T."Date"
 AND Table1."acct" = T."acct"

OUTPUT

| Date | acct |  amt |
|------|------|------|
|    x |  123 | -1.1 |
|    x |  123 |  2.3 |
|    y |  234 |  1.4 |
|    y |  234 |  1.5 |
|    y |  234 | -4.3 |