C # ACCESS Modifies table logging prompt for "UPDATE statement syntax error" issue

The wrong SQL statement is as follows:

SQLSTR = "Update tb_userinfo set password= '" + pw + "' where username= '" + un + "'"; Bad SQL statement

The correct SQL statements are as follows:

SQLSTR = "Update tb_userinfo set [password]= '" + pw + "' where username= '" + un + "'"; The correct SQL statement

Cause of error: Password or password is a keyword and must be added square brackets [password] or [password]

C # ACCESS Modifies table logging prompt for "UPDATE statement syntax error" issue