sql中列转行unpivot、行转列pivot详细讲解||Mysql Oracle sqlserv DB2数据库

目录:
一、sqlserver列转行、行转列详解
二、Oracle列转行、行转列详解
三、DB2列转行、行转列详解
四、MYSQL列转行、行专列详解
五、练习数据

练习数据在文末,使用时需要修改表名,和建表语句

每次学习新语法时,我习惯性的在四种数据库中逐一练习,这个是职业习惯哈哈。虽然去年写过oracle,db2列转行文章,不过……感觉除了我没人可以看懂,附上去年文章的截图,不过说实话DB2列转行使用跟其他数据库差距还是挺大。

灵机一动,发现还可以附带可以把with函数学习了。上面都是个人感悟,现在我们一起学习Mysql Oracle sqlserv DB2列转行、行转列的使用吧。
上班的时候公司开发很惊讶说“你居然会用列转行”

一、sqlserver列转行、行转列详解

我们看下这张表,总共是26列,1547行数据

select  *  from water_quality

1、列转行unpivot

UNPIVOT函数的格式如下:

UNPIVOT([转换为行的列值在转换后对应的列名] for [转换为行的列名在转换后对应的列名] 
in ([转换为行的列1],[转换为行的列2],[转换为行的列3],...[转换为行的列N]))

函数讲解:

  • [转换为行的列值在转换后对应的列名]这个是进行列转行的列其数据值在转换为行后的列名称,就是要转换的列对应的数据值用什么字段表示
  • [转换为行的列名在转换后对应的列名]这个是进行列转行的列其列名在转换为行后的列名称,就是要转换的列用什么字段表示
  • [转换为行的列]这个是声明哪些列要进行列转行,就是要转换为行的列名逐一列出来

问题1:把PJJG后的字段转换为行


select 
//NF, YF, HL, DMMC, PJJG ----这里不能单独列几个字段,一定要用select *,至于结果差异大家可以运行后体会
* from water_quality
unpivot(  
//   POLLUTEVALUE for CODE_POLLUTE---上面字段无中括号就报错,按照下面有中括号的格式就不报错。不知道是不是数据库不兼容
 [POLLUTEVALUE] for [CODE_POLLUTE]
 IN(
JCXM_PH ,   JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL ,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,
JCXM_TONG  ,JCXM_XIN,JCXM_XI ))
as a--------#as一定要有,没有就报错,我也不知道为什么。可能是特定的语法格式吧
[转换为行的**列值**在转换后对应的列名]对应POLLUTEVALUE
[转换为行的**列名**在转换后对应的列名]对应CODE_POLLUTE
[转换为行的列]对应JCXM_PH , JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,JCXM_TONG  ,JCXM_XIN,JCXM_XI

我们看下转换后的结果

2、行转列PIVOT

PIVOT函数的格式如下

PIVOT(<聚合函数>([聚合列值]) FOR [行转列前的列名]
 IN([行转列后的列名1],[行转列后的列名2],[行转列后的列名3],.......[行转列后的列名N]))

函数讲解:

  • <聚合函数>就是我们使用的SUM,COUNT,AVG等Sql聚合函数,也就是行转列后计算列的聚合方式。
  • [聚合列值]要进行聚合的列名
  • [行转列前的列名]这个就是需要将行转换为列的列名
  • [行转列后的列名]这里需要声明将行的值转换为列后的列名,因为转换后的列名其实就是转换前行的值,所以上面格式中的[行转列后的列名1],[行转列后的列名2],[行转列后的列名3],......[行转列后的列名N]其实就是[行转列前的列名]每一行的值。

问题2:把CODE_POLLUTE污染物编码字段以列的方式显示

解答1:
 ---water_quality_temp这个表是问题1查询后保存的结果表啦
select *
from water_quality_temp 
PIVOT(max(POLLUTEVALUE) FOR [CODE_POLLUTE] -----#max换成count会看见不同的结果
IN(JCXM_PH ,    JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL ,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,
JCXM_TONG  ,JCXM_XIN,JCXM_XI)) AS T 

解答2:
-----如果没有将问题1结果报错,可以这样写
with water_quality_temp as(
select 
//NF, YF, HL, DMMC, PJJG ----这里不能单独列几个字段,一定要用select *,至于结果差异大家可以运行后体会
* from water_quality
unpivot(  
//   POLLUTEVALUE for CODE_POLLUTE---上面字段无中括号就包括,按照下面有中括号的格式就不报错。不知道是不是不兼容
 [POLLUTEVALUE] for [CODE_POLLUTE]
 IN(JCXM_PH ,   JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL ,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,
JCXM_TONG  ,JCXM_XIN,JCXM_XI ))
as a)----#as一定要有,没有就报错
select *
from water_quality_temp 
PIVOT(max(POLLUTEVALUE) FOR [CODE_POLLUTE] IN(JCXM_PH , JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL ,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,
JCXM_TONG  ,JCXM_XIN,JCXM_XI)) AS T 

- <聚合函数>本例中的max
- [聚合列值]本例中的POLLUTEVALUE
- [行转**列前**的列名]本例中的CODE_POLLUTE
- [行转**列后**的列名]本例中的CXM_PH , JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL ,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,JCXM_TONG  ,JCXM_XIN,JCXM_XI

我们看下转换后的结果

二、Oracle列转行、行转列详解

1、Oracle列转行unpivot

UNPIVOT函数的格式如下:

UNPIVOT([转换为行的列名在转换后对应的列名] for [转换为行的列值在转换后对应的列名] 
in ([转换为行的列1],[转换为行的列2],[转换为行的列3],...[转换为行的列N]))

函数的讲解
Oracle列转行函数的讲解跟sqlserver一样,这里就不详细介绍了,我们直接使用
我们先看下源表

select  *  from TJSXM.water_quality


问题1:把PJJG后的字段转换为行

select 
*  from TJSXM.water_quality
unpivot(  POLLUTEVALUE for CODE_POLLUTE
 IN(JCXM_PH ,   JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL ,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,
JCXM_TONG  ,JCXM_XIN,JCXM_XI )) 
----和SQLSERVER区别,这里没有as
[转换为行的**列值**在转换后对应的列名]对应POLLUTEVALUE
[转换为行的**列名**在转换后对应的列名]对应CODE_POLLUTE
[转换为行的列]对应JCXM_PH , JCXM_RYL,JCXM_GMSYZS ,JCXM_SHXYL ,JCXM_AD ,JCXM_SYL,JCXM_HFF,JCXM_GONG  ,JCXM_QIAN  ,JCXM_GE ,JCXM_YLZBMHXJ  ,JCXM_LUO,JCXM_FHW,JCXM_ZL,JCXM_QHW,JCXM_LHW,JCXM_SHEN  ,JCXM_HXXYL ,JCXM_TONG  ,JCXM_XIN,JCXM_XI

我们看下结果

2、Oracle行转列pivot

PIVOT函数的格式如下

PIVOT(<聚合函数>([聚合列值]) FOR [行转列前的列名]
 IN('行转列前的列名值1' [行转列后的列名1],' 行转列前的列名值2'  [行转列后的列名2],'行转列前的列名值3' [行转列后的列名3],.......' 行转列前的列名值n'  [行转列后的列名N]))

#行转列前的列名值2=
#select  distinct  行转列前的列名 from 表名

问题2:把POLLUTEVALUE污染物编码字段以列的方式显示

select *
from TJSXM.water_quality_temp 
PIVOT(max(CODE_POLLUTE) FOR POLLUTEVALUE IN(---- --#POLLUTEVALUE 即要转成列的字段
'JCXM_PH'  JCXM_PH,------#max(CODE_POLLUTE) 此处必须为聚合函数
'JCXM_RYL'  JCXM_RYL,-----------#in () 对要转成列的每一个值指定一个列名
'JCXM_GMSYZS'  JCXM_GMSYZS,
'JCXM_SHXYL'  JCXM_SHXYL,
'JCXM_AD'  JCXM_AD,
'JCXM_SYL'  JCXM_SYL,
'JCXM_HFF'  JCXM_HFF,
'JCXM_GONG'  JCXM_GONG,
'JCXM_QIAN'  JCXM_QIAN,
'JCXM_GE'  JCXM_GE,
'JCXM_YLZBMHXJ'  JCXM_YLZBMHXJ,
'JCXM_LUO'  JCXM_LUO,
'JCXM_FHW'  JCXM_FHW,
'JCXM_ZL'  JCXM_ZL,
'JCXM_QHW'  JCXM_QHW,
'JCXM_LHW'  JCXM_LHW,
'JCXM_SHEN'  JCXM_SHEN,
'JCXM_HXXYL'  JCXM_HXXYL,
'JCXM_TONG'  JCXM_TONG,
'JCXM_XIN'  JCXM_XIN,
'JCXM_XI'  JCXM_XI))

我们看下结果

image.png

三、DB2列转行、行转列详解

1、DB2列转行

先看下源表

select * from TJSXM.water_quality_temp


函数格式:
DB2列转行不能使用函数unpivot,也没找到相应的函数格式,带大家从案例里面体会

问题1:把PJJG后的字段转换为行

select 
a.NF,a.YF,a.HL,a.DMMC,a.DMLX ,a.PJJG,q.polutcode,q.polut_value
from TJSXM.water_quality a,
TABLE (VALUES
('Ph(pH无量纲)',a.JCXM_PH),
('溶解氧',a.JCXM_RYL),
('高锰酸盐指数',a.JCXM_GMSYZS),
('生化需氧量(BOD5)',a.JCXM_SHXYL),
('氨氮',a.JCXM_AD),
('石油类(石油醚萃取)',a.JCXM_SYL),
('挥发酚',a.JCXM_HFF),
('汞',a.JCXM_GONG),
('铅',a.JCXM_QIAN),
('镉',a.JCXM_GE),
('阴离子表面活性剂',a.JCXM_YLZBMHXJ),
('铬(六价)',a.JCXM_LUO),
('氟化物(以F-计)',a.JCXM_FHW),
('总磷(以P计)',a.JCXM_ZL),
('氰化物',a.JCXM_QHW),
('硫化物',a.JCXM_LHW),
('砷',a.JCXM_SHEN),
('化学需氧量(CODcr)',a.JCXM_HXXYL),
('铜',a.JCXM_TONG),
('锌',a.JCXM_XIN),
('硒(四价)',a.JCXM_XI)
)
AS q(polutcode, polut_value)
#每个values中对应列的数据类型必须相同,值可以任意,如1,2,3,4都是整形

下面解释一下执行的过程:
核心是用table函数创建了一个表,这个表是用value实现的多行表,value实现虚表的例子:

所不同的是这里跟from子句中的一个表产生了关系,取出了表中的一列作为数据。参考文章:db2中的列转行和行转列

我们看下列转行结果:

2、DB2行转列

函数格式
很遗憾DB2行转列不能使用unpivot函数,只能用max函数。我们一起写下吧

问题2:把CODE_POLLUTE 污染物编码字段以列的方式显示

select
  NF,YF,HL,DMMC,PJJG,
 max(case when  CODE_POLLUTE = 'JCXM_PH'then POLLUTEVALUE end) JCXM_PHJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_RYL'then POLLUTEVALUE end) JCXM_RYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_GMSYZS'then POLLUTEVALUE end) JCXM_GMSYZSJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_SHXYL'then POLLUTEVALUE end) JCXM_SHXYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_AD'then POLLUTEVALUE end) JCXM_ADJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_SYL'then POLLUTEVALUE end) JCXM_SYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_HFF'then POLLUTEVALUE end) JCXM_HFFJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_GONG'then POLLUTEVALUE end) JCXM_GONGJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_QIAN'then POLLUTEVALUE end) JCXM_QIANJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_GE'then POLLUTEVALUE end) JCXM_GEJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_YLZBMHXJ'then POLLUTEVALUE end) JCXM_YLZBMHXJJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_LUO'then POLLUTEVALUE end) JCXM_LUOJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_FHW'then POLLUTEVALUE end) JCXM_FHWJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_ZL'then POLLUTEVALUE end) JCXM_ZLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_QHW'then POLLUTEVALUE end) JCXM_QHWJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_LHW'then POLLUTEVALUE end) JCXM_LHWJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_SHEN'then POLLUTEVALUE end) JCXM_SHENJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_HXXYL'then POLLUTEVALUE end) JCXM_HXXYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_TONG'then POLLUTEVALUE end) JCXM_TONGJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_XIN'then POLLUTEVALUE end) JCXM_XINJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_XI'then POLLUTEVALUE end) JCXM_XIJCXM_PH 
 from  water_quality_temp ----已存在数据库中
 group by NF,YF,HL,DMMC,PJJG

我们看下运行结果:

四、MYSQL列转行、行转列详解

1、MYSQL列转行

函数格式
MYSQL列转行是不能使用unpivot函数的,我在网上百度了3个小时都没找到。所以先用union all函数吧【内心很崩溃】

问题1:把PJJG后的字段转换为一行

select NF,YF,HL,DMMC,PJJG, 'JCXM_PH' CODE_POLLUTE , JCXM_PH as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_PH' CODE_POLLUTE, JCXM_PH as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_RYL' CODE_POLLUTE, JCXM_RYL as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_GMSYZS' CODE_POLLUTE, JCXM_GMSYZS as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_SHXYL' CODE_POLLUTE, JCXM_SHXYL as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_AD' CODE_POLLUTE, JCXM_AD as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_SYL' CODE_POLLUTE, JCXM_SYL as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_HFF' CODE_POLLUTE, JCXM_HFF as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_GONG' CODE_POLLUTE, JCXM_GONG as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_QIAN' CODE_POLLUTE, JCXM_QIAN as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_GE' CODE_POLLUTE, JCXM_GE as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_YLZBMHXJ' CODE_POLLUTE, JCXM_YLZBMHXJ as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_LUO' CODE_POLLUTE, JCXM_LUO as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_FHW' CODE_POLLUTE, JCXM_FHW as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_ZL' CODE_POLLUTE, JCXM_ZL as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_QHW' CODE_POLLUTE, JCXM_QHW as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_LHW' CODE_POLLUTE, JCXM_LHW as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_SHEN' CODE_POLLUTE, JCXM_SHEN as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_HXXYL' CODE_POLLUTE, JCXM_HXXYL as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_TONG' CODE_POLLUTE, JCXM_TONG as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_XIN' CODE_POLLUTE, JCXM_XIN as POLLUTEVALUE from water_quality
union select NF,YF,HL,DMMC,PJJG, 'JCXM_XI' CODE_POLLUTE, JCXM_XI as POLLUTEVALUE from water_quality
order by NF,YF,HL,DMMC,PJJG

我们看下运行结果

2、MYSQL行转列

函数格式
很遗憾MYSQL行转列不能使用unpivot函数,只能跟DB2数据库一样,只能用max函数。

问题2:把CODE_POLLUTE 污染物编码字段以列的方式显示

select
  NF,YF,HL,DMMC,PJJG,
 max(case when  CODE_POLLUTE = 'JCXM_PH'then POLLUTEVALUE end) JCXM_PHJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_RYL'then POLLUTEVALUE end) JCXM_RYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_GMSYZS'then POLLUTEVALUE end) JCXM_GMSYZSJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_SHXYL'then POLLUTEVALUE end) JCXM_SHXYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_AD'then POLLUTEVALUE end) JCXM_ADJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_SYL'then POLLUTEVALUE end) JCXM_SYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_HFF'then POLLUTEVALUE end) JCXM_HFFJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_GONG'then POLLUTEVALUE end) JCXM_GONGJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_QIAN'then POLLUTEVALUE end) JCXM_QIANJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_GE'then POLLUTEVALUE end) JCXM_GEJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_YLZBMHXJ'then POLLUTEVALUE end) JCXM_YLZBMHXJJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_LUO'then POLLUTEVALUE end) JCXM_LUOJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_FHW'then POLLUTEVALUE end) JCXM_FHWJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_ZL'then POLLUTEVALUE end) JCXM_ZLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_QHW'then POLLUTEVALUE end) JCXM_QHWJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_LHW'then POLLUTEVALUE end) JCXM_LHWJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_SHEN'then POLLUTEVALUE end) JCXM_SHENJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_HXXYL'then POLLUTEVALUE end) JCXM_HXXYLJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_TONG'then POLLUTEVALUE end) JCXM_TONGJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_XIN'then POLLUTEVALUE end) JCXM_XINJCXM_PH ,
max(case when  CODE_POLLUTE = 'JCXM_XI'then POLLUTEVALUE end) JCXM_XIJCXM_PH 
 from  water_quality_temp ----已存在数据库中
 group by NF,YF,HL,DMMC,PJJG

我们看下运行结果:

五、练习数据

使用时需要数据库修改表名,和建表语句
建表语句

CREATE TABLE water_quality  ( 
    NF              varchar(20) NULL,
    YF              varchar(20) NULL,
    HL              varchar(50) NULL,
    DMMC            varchar(50) NULL,
    PJJG            varchar(50) NULL,
    JCXM_PH         varchar(50) NULL,
    JCXM_RYL        varchar(50) NULL,
    JCXM_GMSYZS     varchar(50) NULL,
    JCXM_SHXYL      varchar(50) NULL,
    JCXM_AD         varchar(50) NULL,
    JCXM_SYL        varchar(50) NULL,
    JCXM_HFF        varchar(50) NULL,
    JCXM_GONG       varchar(50) NULL,
    JCXM_QIAN       varchar(50) NULL,
    JCXM_GE         varchar(50) NULL,
    JCXM_YLZBMHXJ   varchar(50) NULL,
    JCXM_LUO        varchar(50) NULL,
    JCXM_FHW        varchar(50) NULL,
    JCXM_ZL         varchar(50) NULL,
    JCXM_QHW        varchar(50) NULL,
    JCXM_LHW        varchar(50) NULL,
    JCXM_SHEN       varchar(50) NULL,
    JCXM_HXXYL      varchar(50) NULL,
    JCXM_TONG       varchar(50) NULL,
    JCXM_XIN        varchar(50) NULL,
    JCXM_XI         varchar(50) NULL )

插入数据
数据量太大这里给大家提供网盘。
网盘链接:https://pan.baidu.com/s/1nTMvJopi9KJFnWOEEHXmQw
提取码:msoh

六、感受

最大的感受就是MYSQL列转行、行转列太不友好了,都没函数提供。

本来可以拆分成4篇文章的,合并在一个文章啦,以后有需要在拆分吧~~~
其实不同数据库列转行、行转列区别挺明显的,当然罗如果不用函数,用方法就没什么区别啦

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