sql - Replace all occurrences of a substring in a database text field -

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i have database has around 10k records , of them contain html characters replace.

for example can find occurrences:

select * table textfield '%&#47%'

the original string example:

this cool mega string contains &#47

how replace &#47 / ?

the end result should be:

this cool mega string contains /

if want replace specific string string or transformation of string, use "replace" function in postgresql. instance, replace occurances of "cat" "dog" in column "myfield", do:

update tablename set myfield = replace(myfield,"cat", "dog")

you add clause or other logic see fit.

alternatively, if trying convert html entities, ascii characters, or between various encoding schemes, postgre has functions well. postgresql string functions.


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