使用Oracle 8i进行子查询

Question

We have a SQL script that creates a CSV using the following:

SELECT DISTINCT auf_kopf.auf_nr, TO_CHAR(auf_kopf.erfass_dat,'DD/MM/YYYY'), TO_CHAR(auf_kopf.liefer_dat,'DD/MM/YYYY'), v_ord_custname.cust_name, auf_pos.auf_pos, v_auf_stat_0.anz, v_reason_code_1.reason_code, v_reason_code_1.reason_desc, v_auf_pos_vmat.glas1, auf_pos.glas2, auf_kopf.auf_off, auf_pos.ver_art
FROM auf_kopf, auf_pos, v_auf_pos_vmat, v_auf_stat_0, v_ord_custname, v_reason_code_1, glas_daten_basis
WHERE auf_kopf.erfass_dat >sysdate-7
AND auf_kopf.kopf_reason IS NOT NULL
AND (auf_kopf.auf_nr=auf_pos.auf_nr(+))
AND (auf_pos.auf_nr=v_auf_pos_vmat.auf_nr(+))
AND (auf_pos.auf_pos=v_auf_pos_vmat.auf_pos(+))
AND (auf_pos.variante=v_auf_pos_vmat.variante(+))
AND (auf_pos.auf_nr=v_auf_stat_0.auf_nr)
AND (auf_pos.auf_pos=v_auf_stat_0.auf_pos)
AND (auf_pos.variante=v_auf_stat_0.variante)
AND (auf_kopf.auf_nr=v_ord_custname.order_no)
AND (auf_kopf.auf_nr=v_reason_code_1.order_no(+));

There is a table called glas_daten_basis that contains descriptions for the codes shown from v_auf_pos_vmat.glas1 and auf_pos.glas2 . How do we show the description also as I think a sub query is required but I couldn't get it to work.

We need glas_daten_basis.gl_bez (description) for v_auf_pos_vmat.glas1 and auf_pos.glas2 . The codes can be matched using glas_daten_basis.idnr and v_auf_pos_vmat.glas1 .

Answer 1

As far as I can follow this, I think you just need to join to glas_daten_basis twice:

SELECT DISTINCT auf_kopf.auf_nr, TO_CHAR(auf_kopf.erfass_dat,'DD/MM/YYYY'), 
  TO_CHAR(auf_kopf.liefer_dat,'DD/MM/YYYY'), v_ord_custname.cust_name, 
  auf_pos.auf_pos, v_auf_stat_0.anz, v_reason_code_1.reason_code,
  v_reason_code_1.reason_desc,
  v_auf_pos_vmat.glas1 ||' '|| gd_basis1.gl_bez as glas1,
  auf_pos.glas2 ||' '|| gd_basis2.gl_bez as glas2,
  auf_kopf.auf_off, auf_pos.ver_art
FROM auf_kopf, auf_pos, v_auf_pos_vmat, v_auf_stat_0, v_ord_custname,
  v_reason_code_1, glas_daten_basis gd_basis1, glas_daten_basis gd_basis2
WHERE auf_kopf.erfass_dat >sysdate-7
AND auf_kopf.kopf_reason IS NOT NULL
AND (auf_kopf.auf_nr=auf_pos.auf_nr(+))
AND (auf_pos.auf_nr=v_auf_pos_vmat.auf_nr(+))
AND (auf_pos.auf_pos=v_auf_pos_vmat.auf_pos(+))
AND (auf_pos.variante=v_auf_pos_vmat.variante(+))
AND (auf_pos.auf_nr=v_auf_stat_0.auf_nr)
AND (auf_pos.auf_pos=v_auf_stat_0.auf_pos)
AND (auf_pos.variante=v_auf_stat_0.variante)
AND (auf_kopf.auf_nr=v_ord_custname.order_no)
AND (auf_kopf.auf_nr=v_reason_code_1.order_no(+))
AND (v_auf_pos_vmat.glas1 = gd_basis1.idnr(+))
AND (auf_pos.glas2 = gd_basis2.idnr(+));

I've aliased the two references to that table so you can distinguish between them. One instance of the table is outer joined to v_auf_pos_vmat , the other to auf_pos . It's been a while since I've used the old (+) notation, but I think I've got them in the right place for what you're doing...

Incidentally, the brackets around all the conditions are unnecessary though, since there is no ambiguity to resolve.