MySQL escape character "/" mysql identifies the following translination characters: / 0 A ASCII 0 (NUL) character. / N A new line character. / T a locator. / R A carriage return. / B A escape. / 'A single quotes ("'"). / "A double quotation mark (" ""). // A backslash ("/") function. /% A "%" character. It is used to search "%" text instance in the body, otherwise "%" will be construed as a wildcard. / _ A "_" character. It is used to search for "_" text instance in the body, otherwise "_" will be interpreted as a wildcard. Note that if you use "/%" or "/% _" in some textures, these will return strings "/%" and "/ _" rather than "%" and "_". ★★ There are several ways to include quotes in a string: 1, must escape: a string is referenced by single quotation marks "'", the single quotes "'" in this string can be "''" Mode escape. A string is referenced by dual quotation marks "" "," "" "characters in this string can be escaped in" "". At the same time, you can also continue to use a escape character "/" to escape 2, can not be used: a string "" "is referenced, the single quotes" '"in this string do not need special treatments And it is not necessary to be repeated or escaped. Similarly, a string is referenced by single quotation marks "'", and the dual quotes "" "in this string do not need special treatments and do not have to be repeated or escaped.