If either string is of datatype VARCHAR2, the result has datatype VARCHAR2 and is limited to 4000 characters. Trailing blanks in character strings are preserved by concatenation, regardless of the strings' datatypes. On most platforms, the concatenation operator is two solid vertical bars, as shown in Table 3-3. However, some IBM platforms use broken vertical bars for this operator.
George Marks/Retrofile/Getty Images. If a thunderstorm is rolling in, your chances of being struck by lightning are one in 600,000, but this risk is elevated if you take a shower or bath, wash laundry or dishes, or even clean your hands in the sink during the storm.
Similarly, kinking the hose while the machine is running can force water through the walls of the hose with enough pressure to cause injury. You should always wear eye protection while spraying, and if you suspect the surface has a coating of lead-based paint, avoid using a power washer altogether.praying with a power washer is easy, although it's a good idea to wear rain gear while doing it. The tip needs to be close enough to the surface you're cleaning to power off the paint, but holding it too close can wear ridges into wood and even concrete.