php - mysql substitution variables -


i don't want open new question such basic question need help. im studying mysql , started substitution variables

consider simple statement:

  select empid, surname      employees         empid = &empid

oracle gives me error not variables bound. please, enlighten me wrong statement?

see oracle application express docs: https://docs.oracle.com/cd/e14373_01/user.32/e13370/sql_proc.htm#aeutl228

bind variables prefixed colon.

so change query to:

 select empid, surname      employees         empid = :empid

when run query, popup window asking supply value of :empid.


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