本文是《使用SQL计算宝宝每次吃奶的时间间隔》的续篇，因为我工作繁忙，时常不能及时帮助媳妇儿记录，为了让不懂数据库的媳妇儿也可以自己用手机熟练操作。我继续做了一些修正和封装：
- 1.给媳妇儿的手机下载一个terminal终端软件termius，实现只需打开app就可以连接到环境；
- 2.跟媳妇儿进一步沟通需求，按她能够接受的使用习惯来修正并封装程序，原则是尽可能的简化操作。
先来看下改进后最终的使用效果：
--1.手机上打开termius软件，点击进入到终端，输入 h 可以看到所有命令的说明：
[oracle@jystdrac1 ~]$ h
**Command for Baby's feed_time:**
Usage:
v - View Today's Result.
vv <'mmdd'> - View one day's Result.
i - Insert a row using current time.
ii <'mmdd hh24:mi'> - Insert a row using input time.
d <id> - Delete a mistake row by id.
u <label> <id> - Update a mistake row by id.
h - Help
--2.输入 v 可以看到今天的喂奶时间和间隔：
[oracle@jystdrac1 ~]$ v
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
55 12-15 07:35 N 207 3.45
56 12-15 10:40 N 185 3.08
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
8 rows selected.
--3.输入 i 可以直接以当前系统时间插入一条数据，并显示插入后的结果：
[oracle@jystdrac1 ~]$ i
Insert a row using current time:
1 row created.
Commit complete.
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
55 12-15 07:35 N 207 3.45
56 12-15 10:40 N 185 3.08
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
94 12-15 23:02 N 227 3.78
9 rows selected.
--4.输入 d <id> 可以删除id对应的那行记录，并显示删除后的结果：
[oracle@jystdrac1 ~]$ d 94
Delete a mistake row by id:
Enter value for id: old 1: delete from t_baby where id = &id
new 1: delete from t_baby where id = 94
1 row deleted.
Commit complete.
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
55 12-15 07:35 N 207 3.45
56 12-15 10:40 N 185 3.08
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
8 rows selected.
--5.输入 u <label> <id> 可以更新指定id的label值，比如将id=55的记录label值修改为'L'，代表这次喂奶量很少，不参与计算
[oracle@jystdrac1 ~]$ u l 55
Update a mistake row by id:
Enter value for label: Enter value for id: old 1: update t_baby set label = upper('&label') where id = &id
new 1: update t_baby set label = upper('l') where id = 55
1 row updated.
Commit complete.
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
56 12-15 10:40 N 392 6.53
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
7 rows selected.
--6.输入 u <label> <id> 可以更新指定id的label值，比如将id=55的记录label值修改回'N',代表这次喂奶量正常，参与计算
[oracle@jystdrac1 ~]$ u n 55
Update a mistake row by id:
Enter value for label: Enter value for id: old 1: update t_baby set label = upper('&label') where id = &id
new 1: update t_baby set label = upper('n') where id = 55
1 row updated.
Commit complete.
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
55 12-15 07:35 N 207 3.45
56 12-15 10:40 N 185 3.08
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
8 rows selected.
--7.输入 ii <'mmdd hh24:mi'> 可以插入指定日期和时间
[oracle@jystdrac1 ~]$ ii '1215 23:00'
Insert a row using input time(mmdd mi:ss) eg: 1215 10:00
Enter value for feed_time: old 1: insert into t_baby(id,feed_time) values(s1.nextval,to_date('&feed_time','mmdd hh24:mi'))
new 1: insert into t_baby(id,feed_time) values(s1.nextval,to_date('1215 23:00','mmdd hh24:mi'))
1 row created.
Commit complete.
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
55 12-15 07:35 N 207 3.45
56 12-15 10:40 N 185 3.08
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
95 12-15 23:00 N 225 3.74
9 rows selected.
--8.删除id=95的这条测试记录
[oracle@jystdrac1 ~]$ d 95
Delete a mistake row by id:
Enter value for id: old 1: delete from t_baby where id = &id
new 1: delete from t_baby where id = 95
1 row deleted.
Commit complete.
View Today's Result:
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
53 12-15 01:00 N 140 2.33
54 12-15 04:08 N 188 3.13
55 12-15 07:35 N 207 3.45
56 12-15 10:40 N 185 3.08
69 12-15 13:16 N 156 2.6
70 12-15 14:32 N 76 1.27
82 12-15 17:14 N 163 2.71
83 12-15 19:15 N 121 2.01
8 rows selected.
--9.使用 vv 'mmdd' 可以显示指定日期的喂奶间隔情况：
[oracle@jystdrac1 ~]$ vv 1214
View Today's Result:
Enter value for feed_time: Enter value for feed_time: old 2: from (select t.*, lag(feed_time) over(order by id) l_time from t_baby t where label <> 'L') where feed_time >= to_date('&feed_time','mmdd') and feed_time < to_date('&feed_time','mmdd') + 1
new 2: from (select t.*, lag(feed_time) over(order by id) l_time from t_baby t where label <> 'L') where feed_time >= to_date('1214','mmdd') and feed_time < to_date('1214','mmdd') + 1
ID FEED_TIME L LAG(min) LAG(h)
---------- ----------- - ---------- ----------
41 12-14 01:55 N 265 4.42
42 12-14 04:58 N 183 3.05
43 12-14 08:25 N 207 3.45
44 12-14 11:23 N 178 2.97
45 12-14 12:23 N 60 1
46 12-14 15:00 N 157 2.62
47 12-14 17:22 N 142 2.37
48 12-14 18:45 N 83 1.38
49 12-14 22:40 N 235 3.92
9 rows selected.
经过一番演示，媳妇儿的反馈是非常满意的，实际她最常用的还是v和i，非常方便，其他命令偶尔使用，其实只需记住h可以获取到帮助即可。下面将本次的修正和封装过程记录一下：
1.环境变量配置别名
为了简化操作，我将环境变量设置一些别名。[oracle@jystdrac1 ~]$ cat ~/.bash_profile
# 这里省略原有环境变量内容,下面为在源文件基础上追加的内容：
# Alias for baby's feed_time:
alias h=/home/oracle/baby_readme.sh
alias v=/home/oracle/baby_view.sh
alias i=/home/oracle/baby_insert.sh
alias d=/home/oracle/baby_delete.sh
alias u=/home/oracle/baby_update.sh
alias ii=/home/oracle/baby_insert_diy.sh
alias vv=/home/oracle/baby_view_diy.sh
2.系统shell脚本
##baby_readme.shvi baby_readme.sh
#!/bin/bash
# script:baby_readme.sh
# version:1.01
#-------------------------------------------------------------
echo "**Command for Baby's feed_time:**"
echo "Usage:"
echo " v - View Today's Result."
echo " vv <'mmdd'> - View one day's Result."
echo " i - Insert a row using current time."
echo " ii <'mmdd hh24:mi'> - Insert a row using input time."
echo " d <id> - Delete a mistake row by id."
echo " u <label> <id> - Update a mistake row by id."
echo " h - Help"
#-------------------------------------------------------------
baby_view.sh
vi baby_view.sh
#!/bin/bash
# script:baby_view.sh
# version:1.01
#-------------------------------------------------------------
sqlplus -S test/test <<EOF
PROMPT View Today's Result:
@v3
EOF
#-------------------------------------------------------------
baby_insert.sh
vi baby_insert.sh
#!/bin/bash
# script:baby_insert.sh
# version:1.01
#-------------------------------------------------------------
sqlplus -S test/test <<EOF
PROMPT Insert a row using current time:
@i1
PROMPT View Today's Result:
@v3
EOF
#-------------------------------------------------------------
baby_delete.sh
vi baby_delete.sh
#!/bin/bash
# script:baby_delete.sh
# version:1.01
#-------------------------------------------------------------
sqlplus -S test/test <<EOF
PROMPT Delete a mistake row by id:
@d1
$1
commit;
PROMPT View Today's Result:
@v3
EOF
#-------------------------------------------------------------
baby_insert_diy.sh
vi baby_insert_diy.sh
#!/bin/bash
# script:baby_insert_diy.sh
# version:1.01
#-------------------------------------------------------------
sqlplus -S test/test <<EOF
PROMPT Insert a row using input time(mmdd mi:ss) eg: 1215 10:00
@i2
$1
commit;
PROMPT View Today's Result:
@v3
EOF
#-------------------------------------------------------------
baby_update.sh
vi baby_update.sh
#!/bin/bash
# script:baby_update.sh
# version:1.01
#-------------------------------------------------------------
sqlplus -S test/test <<EOF
PROMPT Update a mistake row by id:
@u1
$1
$2
commit;
PROMPT View Today's Result:
@v3
EOF
#-------------------------------------------------------------
baby_view_diy.sh
vi baby_view_diy.sh
#!/bin/bash
# script:baby_view.sh
# version:1.01
#-------------------------------------------------------------
sqlplus -S test/test <<EOF
PROMPT View one day's Result:
@v4
$1
$1
EOF
#-------------------------------------------------------------
3.底层SQL文本
--echo "v - View Today's Result."
[oracle@jystdrac1 ~]$ cat v3.sql
SELECT
id,
to_char(feed_time, 'mm-dd hh24:mi') "FEED_TIME",
label,
round((feed_time - l_time) * 24 * 60) "LAG(min)",
round((feed_time - l_time) * 24, 2) "LAG(h)"
FROM
(
SELECT
t.*,
LAG(feed_time) OVER(ORDER BY id) l_time
FROM
t_baby t
WHERE
label <> 'L'
)
WHERE
feed_time >= trunc(sysdate)
/
-- echo " vv <'mmdd'> - View one day's Result."
[oracle@jystdrac1 ~]$ cat v4.sql
SELECT
id,
to_char(feed_time, 'mm-dd hh24:mi') "FEED_TIME",
label,
round((feed_time - l_time) * 24 * 60) "LAG(min)",
round((feed_time - l_time) * 24, 2) "LAG(h)"
FROM
(
SELECT
t.*,
LAG(feed_time) OVER(ORDER BY id) l_time
FROM
t_baby t
WHERE
label <> 'L'
)
WHERE
feed_time >= TO_DATE('&feed_time', 'mmdd')
AND feed_time < TO_DATE('&feed_time', 'mmdd') + 1
/
--echo "i - Insert a row using current time."
[oracle@jystdrac1 ~]$ cat i1.sql
insert into t_baby(id,feed_time) values(s1.nextval,sysdate)
/
commit
/
--echo "ii - Insert a row using input time."
[oracle@jystdrac1 ~]$ cat i2.sql
insert into t_baby(id,feed_time) values(s1.nextval,to_date('&feed_time','mmdd hh24:mi'))
/
--echo "d - Delete a mistake row by id. "
[oracle@jystdrac1 ~]$ cat d1.sql
delete from t_baby where id = &id
/
--echo "u - Update a mistake row by id."
[oracle@jystdrac1 ~]$ cat u1.sql
update t_baby set label = upper('&label') where id = &id
/
SQL文本独立出来也方便后续需求有变化时快速更改。