Question

我在postgresql数据库示例表s_attrs属性中有很多记录，如

sex = female, age = 32 years, disease = hepatitis B:DOID:2043
sex = male, age = 35 years, disease = hepatitis B:DOID:2043
sex = male, age = 34 years, disease = hepatitis B:DOID:2043
sex = male, age = 55 years, disease = hepatitis B:DOID:2043
sex = male, age = 37 years, disease = hepatitis B:DOID:2043
sex = female, age = 31 years, disease = hepatitis B:DOID:2043

我想将其改为喜欢

sex="female", age="32 years", disease="hepatitis B:DOID:2043"
sex="male", age="35 years", disease="hepatitis B:DOID:2043"
sex="male", age="34 years", disease="hepatitis B:DOID:2043"
sex="male", age="55 years", disease="hepatitis B:DOID:2043"
sex="male", age="37 years", disease="hepatitis B:DOID:2043"
sex="female", age="31 years", disease="hepatitis B:DOID:2043"

删除等号之间的空格并添加引号，我怎样才能改变它。我想使用更新并替换sql，但我不知道该怎么做

Answer 1

下面是示例替换语句

选择替换（

替换（'性别=女性，年龄= 32岁，疾病=乙型肝炎：DOID：2043'，'='，'=''）

，'，'，'“，'）+'”';

Answer 2

假设您的表中有一个id列，您的基本查询可能如下所示

WITH attr_explode AS 
(
  SELECT id, unnest(string_to_array(s_attrs, ',')) attr
    FROM Table1 
)
SELECT id, array_to_string(array_agg(concat(trim(split_part(attr, '=', 1)), '="', trim(split_part(attr, '=', 2)), '"')), ',') s_attrs
  FROM attr_explode
 GROUP BY id

输出：

| ID |                                                     S_ATTRS |
--------------------------------------------------------------------
|  1 | sex="female",age="32 years",disease="hepatitis B:DOID:2043" |
|  2 |   sex="male",age="35 years",disease="hepatitis B:DOID:2043" |
 ...

这是 SQLFiddle 演示

现在更新你可以做到

WITH attr_explode AS 
(
  SELECT id, unnest(string_to_array(s_attrs, ',')) attr
    FROM Table1 
), attr_replace AS
(
  SELECT id, array_to_string(array_agg(concat(trim(split_part(attr, '=', 1)), '="', trim(split_part(attr, '=', 2)), '"')), ',') s_attrs
    FROM attr_explode
   GROUP BY id
)
UPDATE Table1 t 
   SET s_attrs = r.s_attrs
  FROM attr_replace r 
 WHERE t.id = r.id

这是 SQLFiddle 演示

Answer 3

您是否在表格的一列中拥有所有这些信息？

因为如果是这样，您可能希望将您的设计更改为3列：性别，年龄，疾病。

无论如何，如果你想改变这个，那就像是：

UPDATE REPLACE(column_name, ',' , '",') FROM table_name WHERE condition;

UPDATE REPLACE(column_name, '= ' , '="') FROM table_name WHERE condition;

UPDATE CONCAT(column_name, '"' ) FROM table_name WHERE condition;

这将是这样的，但同样重新考虑你的设计。

Answer 4

$str="sex = female, age = 32 years, disease = hepatitis B:DOID:2043";

$str=str_replace(" = ","=",$str);
//echo $str;
$str=str_replace('=','="', $str);
//echo $str;
$str=str_replace(',','",', $str);
echo $str.'"';


Find this is an Example. It may useful for your need.

数据库sql替换语句更新记录

4 个答案: