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This article introduces the knowledge of "how to remove the first character from mysql". In the operation of practical cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Methods: 1, the use of right function, syntax for "update table name set specified field = right (specified field, length (specified field)-1)."; 2, the use of substring function, the syntax is "select substring (specified field, 2)."

The operating environment of this tutorial: windows10 system, mysql8.0.22 version, Dell G3 computer.

How does mysql remove the first character?

MySQL string interception related functions:

1. Intercept the string from the right

Right (str, length)

Description: right (intercepted field, intercepted length)

Example:

Select right (content,200) as abstract from my_content_t

Remove the first character of the specified field. "

Update table name set specified field = right (specified field, length (specified field)-1) WHERE specified field like'"%'

2. Intercept the string

Substring (str, pos) substring (str, pos, length)

Description: substring (intercepted field, which bit to intercept)

Substring (intercepted field, which bit to intercept, intercept length)

Example:

Select substring (content,5) as abstract from my_content_tselect substring (content,5200) as abstract from my_content_t

(note: if the number of digits is negative, such as-5, it is the length from the last digit to the end of the string or truncated.)

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