有理由怀疑有人是否能够协助我处理下列问题。
我在MySQL和Im有一个数据库,利用PHPMyAdmin与数据库互动。
因此,在表格中,表_名称 我有两栏:<编码>产品_项目_short和product_item_long
,其中有URL。 现在有3 000个数据流,并作为每一端的URL的一个实例,以<代码>/data/image/aboutimage.png开始。
在这两栏中,我需要删除<代码>/>/,我想知道我如何能够在座这样做。
很多人
有理由怀疑有人是否能够协助我处理下列问题。
我在MySQL和Im有一个数据库,利用PHPMyAdmin与数据库互动。
因此,在表格中,表_名称 我有两栏:<编码>产品_项目_short和product_item_long
,其中有URL。 现在有3 000个数据流,并作为每一端的URL的一个实例,以<代码>/data/image/aboutimage.png开始。
在这两栏中,我需要删除<代码>/>/,我想知道我如何能够在座这样做。
很多人
UPDATE example_table
SET product_item_short = SUBSTRING(product_item_short,6),
product_item_long = SUBSTRING(product_item_long,6);
您可使用SUBSTR(
。 职能:
UPDATE your_table
SET product_item_short = SUBSTR(product_item_short, 6),
product_item_long = SUBSTR(product_item_long, 6);
试验:
CREATE TABLE your_table (
id int,
product_item_short varchar(50),
product_item_long varchar(50)
);
INSERT INTO your_table VALUES (1, data/image/someimage.png , data/image/someimage.png );
INSERT INTO your_table VALUES (2, data/other-folder/someimage.png , data/other-folder/someimage.png );
INSERT INTO your_table VALUES (3, data/no-folder.png , data/no-folder.png );
INSERT INTO your_table VALUES (4, data/image/path/three-levels.png , data/image/path/three-levels.png );
载于UPDATE
后:
SELECT * FROM your_table;
+------+-----------------------------+-----------------------------+
| id | product_item_short | product_item_long |
+------+-----------------------------+-----------------------------+
| 1 | image/someimage.png | image/someimage.png |
| 2 | other-folder/someimage.png | other-folder/someimage.png |
| 3 | no-folder.png | no-folder.png |
| 4 | image/path/three-levels.png | image/path/three-levels.png |
+------+-----------------------------+-----------------------------+
4 rows in set (0.00 sec)
<><>UPDATE:
如果是删除第1条路标的解决方案,无论它为<条码/条码>,还是<条码>,你不妨使用 条码UPDATE your_table
SET product_item_short = SUBSTR(product_item_short, LOCATE( / , product_item_short) + 1),
product_item_long = SUBSTR(product_item_long, LOCATE( / , product_item_long) + 1);
UPDATE tablename
SET product_item_short = REPLACE(product_item_short, data/image/someimage.png , newurl/something.png );
如果你想要比丹尼尔的答复中描述的更加灵活,那么你就能够使用类似的东西。
SUBSTR(product_item_short, LOCATE( / , product_item_short) + 1)
这将在第一次冲突之后切断一切。
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