mysql按关键符号截取字段

比如以下字段内容，我要截取以::::::为分割的部分内容

"banner_2 (1).png::::::/gcjx/e/extend/uploadImg/upload/upload_files/2020-07-02/9d2cba0773d47bad2cc8f8f36ee0a344.png::::::35231
banner_2.png::::::/gcjx/e/extend/uploadImg/upload/upload_files/2020-07-02/912db94a2d747ff28ac7623b4955a28d.png::::::35232
"

写法

substring_index(substring_index(uploadimg, “::::::”, 2), “::::::”, -1) as logoimg

取得的值为

/gcjx/e/extend/uploadImg/upload/upload_files/2020-07-02/9d2cba0773d47bad2cc8f8f36ee0a344.png

写法

substring_index(substring_index(uploadimg, “::::::”, 1), “::::::”, -1) as logoimg

取得的值为

banner_2 (1).png

规则如下，懂了吧

substring_index(str,delim,count)

str:要处理的字符串

delim:分隔符

count:计数