Regular Expression patterns in Oracle SQL developer: include numbers

I am trying to find the pattern using oracle sql developer. Include numbers that are "x0000"," 0000",".0000"

AND REGEXP_INSTR(string=>FTP.TEXT, pattern=>'[x]\d\d\d\d\s', match_parameter=>'i')

Solution

Use

where REGEXP_LIKE(str,'[x.[:space:]]\d{4}','i')

The [x.[:space:]]\d{4} expression matches x, . or any whitespace, then any four digit characters.

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