Converting hex to number & date

Question

Hi!
Im having a problem converting the hex code to the number & date.
select low_value,high_value from ALL_TAB_COL_STATISTICS;
Iv tried HEX_TO_CHAR and that works fine.
select column_name, UTL_I18N.RAW_TO_CHAR(low_value),UTL_I18N.RAW_TO_CHAR(high_value),low_value, UTL_I18N.RAW_TO_CHAR(high_value) from ALL_TAB_COL_STATISTICS where owner = 'user' and table_name = 'table_name';
if you type this statement you will see that numeric fields and date fields get caught up in (¿) type of fields.
Any solution for this?
BR / S-A
Edited by: SweAnderline on 2008-nov-14 12:58

Answer 1

Hi William!
Need your help again.
Iv taken your statement and alterd it a bit.
SELECT c.table_name table_name, c.column_name, c.data_type
, c.histogram
, CASE c.data_type
WHEN 'NUMBER' THEN TO_CHAR(UTL_RAW.CAST_TO_NUMBER(c.low_value))
WHEN 'VARCHAR2' THEN UTL_RAW.CAST_TO_VARCHAR2(c.low_value)
WHEN 'DATE' THEN
RTRIM(TO_NUMBER(SUBSTR(c.low_value,1,2),'XX') -100 ||
LPAD(TO_NUMBER(SUBSTR(c.low_value,3,2),'XX') -100,2,'0') || '-' ||
LPAD(TO_NUMBER(SUBSTR(c.low_value,5,2),'XX'),2,'0') || '-' ||
LPAD(TO_NUMBER(SUBSTR(c.low_value,7,2),'XX'),2,'0') || ' ' ||
LPAD(TO_NUMBER(SUBSTR(c.low_value,9,2),'XX') -1,2,'0') || ':' ||
LPAD(TO_NUMBER(SUBSTR(c.low_value,11,2),'XX') -1,2,'0') || ':' ||
LPAD(TO_NUMBER(SUBSTR(c.low_value,13,2),'XX') -1,2,'0'),':- ')
END AS low_val
, CASE c.data_type
WHEN 'NUMBER' THEN TO_CHAR(UTL_RAW.CAST_TO_NUMBER(c.high_value))
WHEN 'VARCHAR2' THEN UTL_RAW.CAST_TO_VARCHAR2(c.high_value)
WHEN 'DATE' THEN
RTRIM(TO_NUMBER(SUBSTR(c.high_value,1,2),'XX') -100 ||
LPAD(TO_NUMBER(SUBSTR(c.high_value,3,2),'XX') -100,2,'0') || '-' ||
LPAD(TO_NUMBER(SUBSTR(c.high_value,5,2),'XX'),2,'0') || '-' ||
LPAD(TO_NUMBER(SUBSTR(c.high_value,7,2),'XX'),2,'0') || ' ' ||
LPAD(TO_NUMBER(SUBSTR(c.high_value,9,2),'XX') -1,2,'0') || ':' ||
LPAD(TO_NUMBER(SUBSTR(c.high_value,11,2),'XX') -1,2,'0') || ':' ||
LPAD(TO_NUMBER(SUBSTR(c.high_value,13,2),'XX') -1,2,'0'),':- ')
END AS high_val
, c.num_distinct
, c.avg_col_len
, ROUND(c.density,1) AS density
, c.num_nulls, c.nullable
, round(((c.num_nulls*100)/decode(nvl(d.num_rows,1),0,1))) || '%' "Null % of total Rows"
, c.last_analyzed
, d.num_rows "Number of rows in table"
FROM all_tab_columns c, dba_tables d
WHERE c.table_name = d.table_name and c.owner like 'MDB%'
AND c.owner = d.owner
ORDER BY c.table_name asc;
What I cant get to work is my
-- round(((c.num_nulls*100)/decode(nvl(d.num_rows,1),0,1))) || '%' "Null %"
When I execute the statement I get divisor is equal to zero, so I tried to add a nvl if its null then 1, and if its 0 in number of rows then 1.
Iv tried multiple ways to do this but I cant get it to calculate. With the current statement I dont get any results.
I can get it to work if I create a view with this statement and add a specific table_name. But I need to get this to work in the whole schema/user without entering a specific table.
Any ideas what I can do else?
Thx in advance
Cheers