MS SQL Server 2014-Schema-Setup :
CREATE TABLE table_name ( name VARCHAR(50) );
INSERT INTO table_name
SELECT 'AE 344592001H 6186694' UNION ALL
SELECT 'AE_161038002_6044777' UNION ALL
SELECT 'BC_VIVS_HNB011A_1WAM' UNION ALL
SELECT 'BC_56230A_30SP' UNION ALL
SELECT 'CG_3334902_NETWK_ ACTLM_3334912' UNION ALL
SELECT 'CG_3334574_HMO1_CORACT_3334575' UNION ALL
SELECT 'CG_3207160_POSC_1502AH_3207161' UNION ALL
SELECT 'UH_141015_RHM' UNION ALL
SELECT 'UH_127757_RIV' UNION ALL
SELECT 'UH 523725 RIV' UNION ALL
SELECT 'BS_W0055785_C500_M0005672';
Abfrage 1 :
WITH Names ( lvl, name, remaining, idx ) AS (
SELECT 1,
name,
name,
CHARINDEX( '_', name )
FROM table_name
UNION ALL
SELECT lvl+1,
name,
SUBSTRING(remaining,idx+1,LEN(remaining)-idx),
CASE WHEN CHARINDEX( '_', remaining, idx+1 ) = 0
THEN 0
ELSE CHARINDEX( '_', remaining, idx+1 ) - idx
END
FROM Names
WHERE idx > 0
)
SELECT Name,
MAX( CASE WHEN lvl = 3 AND ( Name LIKE 'CG%' OR idx = 0 ) THEN remaining
WHEN lvl = 3 THEN SUBSTRING( remaining, 1, idx - 1 )
END ) AS OPT,
MAX( CASE WHEN lvl = 2 AND ( Name LIKE 'CG%' OR idx = 0 ) THEN remaining
WHEN lvl = 2 THEN SUBSTRING( remaining, 1, idx - 1 )
END ) AS Name2
FROM Names
GROUP BY Name
| Name | OPT | Name2 |
|---------------------------------|----------------------|------------------------------|
| AE 344592001H 6186694 | (null) | (null) |
| AE_161038002_6044777 | 6044777 | 161038002 |
| BC_56230A_30SP | 30SP | 56230A |
| BC_VIVS_HNB011A_1WAM | HNB011A | VIVS |
| BS_W0055785_C500_M0005672 | C500 | W0055785 |
| CG_3207160_POSC_1502AH_3207161 | POSC_1502AH_3207161 | 3207160_POSC_1502AH_3207161 |
| CG_3334574_HMO1_CORACT_3334575 | HMO1_CORACT_3334575 | 3334574_HMO1_CORACT_3334575 |
| CG_3334902_NETWK_ ACTLM_3334912 | NETWK_ ACTLM_3334912 | 3334902_NETWK_ ACTLM_3334912 |
| UH 523725 RIV | (null) | (null) |
| UH_127757_RIV | RIV | 127757 |
| UH_141015_RHM | RHM | 141015 |
Abfrage 2 :
CHARINDEX( expressionToFind, expressionToSerach[, startIndex] )
kann verwendet werden, um die Instanzen von _
zu finden im Wort.
CHARINDEX( '_', name )
findet den Index der ersten Instanz eines_
.CHARINDEX( '_', name, CHARINDEX( '_', name ) + 1 )
findet den Index der zweiten Instanz eines_
oder gibt0
zurück wenn es nicht zwei_
gibt Zeichen.CHARINDEX( '_', name, CHARINDEX( '_', name, CHARINDEX( '_', name ) + 1 ) + 1)
findet den Index der dritten Instanz eines_
oder gibt0
zurück wenn es nicht drei_
gibt Zeichen.
Wenn Sie dies in eine innere Auswahl verschachteln, können Sie es verwenden, um den entsprechenden SUBSTRING
zu erhalten s in einer äußeren Auswahl wie folgt:
SELECT name,
CASE WHEN idx2 > idx1 AND ( Name LIKE 'CG%' OR idx3 = 0 )THEN SUBSTRING( name, idx2 + 1, LEN( name ) )
WHEN idx3 > idx2 THEN SUBSTRING( name, idx2 + 1, idx3 - idx2 - 1 )
END AS OPT,
CASE WHEN name LIKE 'CG%' THEN SUBSTRING( name, idx1 + 1, LEN( name ) )
WHEN idx2 > idx1 THEN SUBSTRING( name, idx1 + 1, idx2 - idx1 - 1 )
END AS Name2
FROM (
SELECT name,
CHARINDEX( '_', name ) AS idx1,
CHARINDEX( '_', name, CHARINDEX( '_', name ) + 1 ) AS idx2,
CHARINDEX( '_', name, CHARINDEX( '_', name, CHARINDEX( '_', name ) + 1 ) + 1 ) AS idx3
FROM table_name
) t
| name | OPT | Name2 |
|---------------------------------|----------------------|------------------------------|
| AE 344592001H 6186694 | (null) | (null) |
| AE_161038002_6044777 | 6044777 | 161038002 |
| BC_VIVS_HNB011A_1WAM | HNB011A | VIVS |
| BC_56230A_30SP | 30SP | 56230A |
| CG_3334902_NETWK_ ACTLM_3334912 | NETWK_ ACTLM_3334912 | 3334902_NETWK_ ACTLM_3334912 |
| CG_3334574_HMO1_CORACT_3334575 | HMO1_CORACT_3334575 | 3334574_HMO1_CORACT_3334575 |
| CG_3207160_POSC_1502AH_3207161 | POSC_1502AH_3207161 | 3207160_POSC_1502AH_3207161 |
| UH_141015_RHM | RHM | 141015 |
| UH_127757_RIV | RIV | 127757 |
| UH 523725 RIV | (null) | (null) |
| BS_W0055785_C500_M0005672 | C500 | W0055785 |