Question

我想在另一个新表中提取带有版本的单词，例如：从每个单元格的第二个表中提取“ fruit 2.0”。我怎样才能做到这一点？下面的数据库示例：

select * from mytable where mytab like'%fruit%'.    

 User   MyTab
    1   ["{myfruit":"apple","store":"mystore","username"andy",\\; fruit 2.0 \\,"mysstore is null=false":"133-aascd-ee54-678v"}"]
    2   ["{myfruit":"apple","store":"mystore","username"andy",\\; fruit 1.2 \\,"mysstore is null=false":"133-aascd-ee54-678v"}"]
    3   ["{myfruit":"apple&banana","store":"mystore","username"andy",\\; fruit 3.0 \\,"mysstore is null=false":"133-aascd-ee54-678v"}"]
    4   ["{myfruit":"apple&banana&pineaple","store":"mystore","username"andy",\\;fruit 1.0 \\,"mysstore is null=false":"133-aascd-ee54-678vsadsaafvvrrrv"}"]

我想要的最终结果是：

User    MyTab2
   1    fruit 2.0
   2    fruit 1.2
   3    fruit 3.0
   4    fruit 1.0

某些列属性：

Data Type   varchar
System Type varchar
Length  8000
Collation   SQL_Latin1_General_CP1_CI_AS
Numeric Precision   0
Numeric Scale   0
Is sparse   FALSE
Is Column Set   FALSE
Statistical Semantics   FALSE
Not for Replication FALSE
ANSI Padding Status TRUE
Full Text   FALSE

Answer 1

我要在此处发布MSSQL解决方案。这是非常人为设计的（可能效率很低），我觉得您应该从数据库中获取列，然后尝试使用regex提取文本。

    SELECT id, SUBSTRING(
      mytab, 
      PATINDEX('%fruit [0-9\.]%', mytab), 
      PATINDEX('%\\,%', mytab)-PATINDEX('%fruit [0-9\.]%', mytab) FROM mytable;

基本上，我在这里是

使用PATINDEX找到X = All 'fruit' occurences followed by a floating number (version)
让Y = \\,的位置，该位置紧随您共享的数据样本中的字符串之后的顺序
我使用MSSQL的SUBSTRING函数从该位置提取子字符串 SUBSTRING(mytab, X, Y-X)

Working SQL Fiddle

如何在MySql中从单元格的中间提取单词？

1 个答案: