The escape character for SQL is: ' (single quote)

The escape character for C + + is:/

The escape character for SQL is: ' (single quote)

Example: SELECT * from TBL where uyear= '06 '

Notice the single quotation mark on the red background, which represents the escape character, and if we omit it, the entire statement will go wrong, the escape character will not output, the actual condition value of uyear in the example above is ' 06, not ' 06

Why not omit, if we omit, the sentence becomes: SELECT * from TBL where uyear='06 '

Because single quotation marks in SQL denote the start and end symbols of a string, the SQL interpreter considers the gray background in the statement to be a string, and the subsequent statement is obviously a wrong statement, and of course the error, in order to solve the single quotation mark problem of the string, there is an escape character list

The escape character for SQL is: ' (single quote)