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我正在精炼一个脚本，以便它可以自动地由最终用户维护&。需要帮助设计用于SQL选择的规则表
之前，我在this SO帖子中提到过这个脚本的一部分。
由于Randy在his中描述的答案中，SQL语句的逻辑应该用表和连接的组合来代替，以实现相同的最终结果。
的基本情况和目标如下：
目前，该脚本会自动分配的顾问根据一套复杂的，涉及多个变量规则的学生。
由于员工（顾问雇用/解雇），专业（增加/删除的项目）和信用时间限制（确定顾问所需的最短时间）的变化，终端方案的规则将随时间而改变。
这些规则需要在脚本/ SQL之外维护，以便最终用户（院长/部门负责人）可以管理终端场景。
需要创建自定义表来有效地管理这些规则。
下面是目前被用来执行这些规则的SQL：
SELECT DISTINCT s.id stu_id,
stu_id.fullname stu_name,
p.major1 major,
p.minor1 minor,
s.reg_hrs,
NVL(st.cum_earn_hrs,0) ttl_hrs,
p.adv_id curr_adv_id,
adv_id.fullname curr_adv_name,
CASE WHEN (p.adv_id <> 35808 AND p.major1 = 'NS') THEN (1165)
WHEN (p.adv_id = 35808 AND p.major1 = 'NS') THEN (35808)
WHEN (p.adv_id = 9179 AND p.major1 = 'DART') THEN (9179)
WHEN (p.minor1 IN ('RT','RESP') AND st.cum_earn_hrs >= 24) THEN (70897)
WHEN (p.major1 IN ('CDSC','CDSD')) THEN (52125)
WHEN (p.major1 IN ('CA','CB')) THEN (24702)
WHEN (p.minor1 = 'NURS') THEN (51569)
WHEN (p.major1 = 'LEG') THEN (13324)
WHEN (p.major1 = 'CC') THEN (73837)
WHEN (p.major1 = 'CCRE') THEN (1133)
WHEN ((p.adv_id IN (SELECT DISTINCT id FROM fac_rec WHERE stat = 'I'))
OR (st.cum_earn_hrs < 24 AND (p.adv_id||p.major1) IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat = 'A' AND max_stu > 0 AND min_hrs >= 24))
OR (s.id NOT IN (SELECT DISTINCT stu.id FROM stu_acad_rec stu, sess_info si WHERE stu.yr = si.prev_yr AND stu.sess = si.prev_sess AND stu.reg_hrs > 0 AND stu.reg_stat IN ('C','R') AND stu.prog = 'UNDG'))
OR ((p.adv_id||p.major1) IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat <> 'A' OR max_stu <= 0))
OR ((p.adv_id||p.major1) NOT IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat = 'A' AND max_stu > 0)))
THEN (9238)
ELSE (p.adv_id)
END new_adv_id,
CASE WHEN (p.adv_id <> 35808 AND p.major1 = 'NS') THEN ('Deborah')
WHEN (p.adv_id = 35808 AND p.major1 = 'NS') THEN ('Veronica')
WHEN (p.adv_id = 9179 AND p.major1 = 'DART') THEN ('Stella')
WHEN (p.minor1 IN ('RT','RESP') AND st.cum_earn_hrs >= 24) THEN ('Lisa')
WHEN (p.major1 IN ('CDSC','CDSD')) THEN ('Joanne')
WHEN (p.major1 IN ('CA','CB')) THEN ('Barbara')
WHEN (p.minor1 = 'NURS') THEN ('Karen')
WHEN (p.major1 = 'LEG') THEN ('Nancy')
WHEN (p.major1 = 'CC') THEN ('Alberta')
WHEN (p.major1 = 'CCRE') THEN ('Naomi')
WHEN ((p.adv_id IN (SELECT DISTINCT id FROM fac_rec WHERE stat = 'I'))
OR (st.cum_earn_hrs < 24 AND (p.adv_id||p.major1) IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat = 'A' AND max_stu > 0 AND min_hrs >= 24))
OR (s.id NOT IN (SELECT DISTINCT stu.id FROM stu_acad_rec stu, sess_info si WHERE stu.yr = si.prev_yr AND stu.sess = si.prev_sess AND stu.reg_hrs > 0 AND stu.reg_stat IN ('C','R') AND stu.prog = 'UNDG'))
OR ((p.adv_id||p.major1) IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat <> 'A' OR max_stu <= 0))
OR ((p.adv_id||p.major1) NOT IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat = 'A' AND max_stu > 0)))
THEN ('Staff')
ELSE (adv_id.fullname)
END new_adv_name,
CASE WHEN (p.adv_id <> 35808 AND p.major1 = 'NS') THEN ('NS majors not assigned to Veronica go to Debbie')
WHEN (p.adv_id = 35808 AND p.major1 = 'NS') THEN ('NS majors stay with Veronica')
WHEN (p.adv_id = 9179 AND p.major1 = 'DART') THEN ('DART majors stay with Stella')
WHEN (p.minor1 IN ('RT','RESP') AND st.cum_earn_hrs >= 24) THEN ('RT-RESP minors go to Lisa')
WHEN (p.major1 IN ('CDSC','CDSD')) THEN ('CDSC-CDSD majors go to Joanne')
WHEN (p.major1 IN ('CA','CB')) THEN ('CA-CB majors go to Barbara')
WHEN (p.minor1 = 'NURS') THEN ('NURS minors go to Karen')
WHEN (p.major1 = 'LEG') THEN ('LEG majors go to Nancy')
WHEN (p.major1 = 'CC') THEN ('CC majors go to Alberta')
WHEN (p.major1 = 'CCRE') THEN ('CCRE majors go to Naomi')
WHEN (p.adv_id IN (SELECT DISTINCT id FROM fac_rec WHERE stat = 'I'))
THEN ('Current advisor is inactive')
WHEN (st.cum_earn_hrs < 24 AND (p.adv_id||p.major1) IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat = 'A' AND max_stu > 0 AND min_hrs >= 24))
THEN ('Total credits for this student did not meet the advisor reqs for this major')
WHEN (s.id NOT IN (SELECT DISTINCT stu.id FROM stu_acad_rec stu, sess_info si WHERE stu.yr = si.prev_yr AND stu.sess = si.prev_sess AND stu.reg_hrs > 0 AND stu.reg_stat IN ('C','R') AND stu.prog = 'UNDG'))
THEN ('This student did not attend '||si.prev_sess||si.prev_yr)
WHEN ((p.adv_id||p.major1) IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE (stat <> 'A' OR max_stu <= 0)))
THEN ('Current advisor is not advising students with this major')
WHEN ((p.adv_id||p.major1) NOT IN (SELECT DISTINCT (id||major) FROM adv_detail WHERE stat = 'A' AND max_stu > 0))
THEN ('Current advisor is not advising students with this major')
ELSE ('Student will stay with current advisor')
END change_comm
FROM stu_acad_rec s,
prog_enr_rec p,
OUTER stu_stat_rec st,
id_rec stu_id,
id_rec adv_id,
sess_info si
WHERE s.id = p.id
AND s.id = st.id
AND s.id = stu_id.id
AND p.adv_id = adv_id.id
AND s.yr = si.curr_yr
AND s.sess = si.curr_sess
AND s.reg_hrs > 0
AND s.reg_stat IN ('C','R')
AND s.prog = 'UNDG'
AND p.prog = 'UNDG'
AND st.prog = 'UNDG'
AND s.id NOT IN (3,287,9238,59999) {System test use IDs}
INTO TEMP stu_list
WITH NO LOG;
我想建一个表来容纳所有这些规则，但从来没有建立一个表这种类型的目的。
我的想法到目前为止是这种结构的表格：
adv_assign_rules
----------------
rule_no
curr_adv_id
major1
major2
minor1
minor2
cum_earn_hrs
new_adv_id
rule_desc
rule_no_ref
rule_stat
rule_date
此表的例子行，将容纳在SQL选择第一种情况可能是这样的：
rule_no 1
curr_adv_id !35808
major1 =NS
major2
minor1
minor2
cum_earn_hrs
new_adv_id 1165
rule_desc NS majors not assigned to 35808 go to Debbie
rule_no_ref
rule_stat A
rule_date 2011-09-26 15:02:26.000
是这样的桌子有什么缺点？这种设置可以适应所有这些规则吗？有谁知道在哪里可以找到用于类似目的的表格的例子吗？
我在寻找有关改进的建议和/或针对此问题的替代解决方案。这些案例陈述中的“其他”情景表明，学生顾问不需要改变。此外，其中逻辑数量最多的情况（在“else”情况下的最后一种情况）将新顾问程序默认为9238 - 这表示已有的其他逻辑将用于分配新的adivsor。以前的所有案例都是默认场景，这些场景是不符合分配新顾问规则的特殊情况 - 这些是我尝试以表格格式重新创建的特例。
更新：我还在寻找重现和/或场景的功能。我添加了两个字段：rule_no & rule_no_ref这是一个序列号（自动递增）和对另一个规则序列号的引用。
在此先感谢任何可以提供的帮助！
我想你可能想为此保留'CASE'。没有某种类型的循环就很难复制短路行为。一种可能性是使用动态SQL，并为每个场景填充“CASE”标准。 – JNK
如果我是唯一一个维护它的人，我会保留它，但最终用户需要一种方法来调整这些规则。我会看看你的其他建议 - 谢谢 – CheeseConQueso