Back to fetch table column
Can you precisely determining every table and column in this SQL statement which is not so much complex with nesting and sub-queries.
With us, however, this tedious procedure can become hassle-free one for you.
Here is the result: ( please note that ma_parkey, me_parkey is not real columns although there were appeared in select list )
Tables:
CDS_H_GRUPPE
Fields:
CDS_H_GRUPPE.c_mandant
CDS_H_GRUPPE.funktionscode
CDS_H_GRUPPE.hist_datum
CDS_H_GRUPPE.parkey1
CDS_H_GRUPPE.parkey2
SELECT c_mandant, hist_datum, parkey1, parkey2, funktionscode, ma_parkey, me_parkey
, CASE WHEN EXISTS (SELECT 1
FROM CDS_H_GRUPPE GRP1
WHERE GRP1.c_mandant = c_mandant
AND GRP1.hist_datum = ADD_MONTHS(LAST_DAY(TRUNC(SYSDATE)), -1)
AND GRP1.funktionscode = 'H'
AND GRP1.parkey1 = ma_parkey)
THEN 1
ELSE NULL
END MA_ME
, CASE WHEN EXISTS (SELECT 1
FROM CDS_H_GRUPPE GRP2
WHERE GRP2.c_mandant = c_mandant
AND GRP2.hist_datum = ADD_MONTHS(LAST_DAY(TRUNC(SYSDATE)), -1)
AND GRP2.funktionscode = 'U'
AND GRP2.parkey1 = me_parkey)
THEN 1
ELSE NULL
END ME_MA
, ROW_NUMBER() OVER (PARTITION BY c_mandant, ma_parkey, me_parkey ORDER BY c_mandant, ma_parkey, me_parkey) ANZ_MA
FROM (SELECT c_mandant, hist_datum, parkey1, parkey2, funktionscode
, CASE WHEN funktionscode = 'U'
THEN parkey1
ELSE parkey2
END MA_PARKEY
, CASE WHEN funktionscode = 'U'
THEN NULL
ELSE parkey1
END ME_PARKEY
FROM
CDS_H_GRUPPE
WHERE
funktionscode IN ('U', 'H')
AND hist_datum = ADD_MONTHS(LAST_DAY(TRUNC(SYSDATE)), -1)
)
Detailed explantion how this works: .NET version,
Java version
Download this demo: C# demo,
Java demo
