![]() For a normal student name used in place of $NAME, e.g. The variable $NAME is the name of the student, and the query would be modified by inserting that name into the query in place of the $NAME variable. A database query in SQL might look like this: SELECT * FROM Students WHERE ( NAME = '$NAME' ) Only the characters being quoted are passed to the command.Īnother Quote Tutorial: 1.1 The Bobby Tables Problem Index The Bobby Tables Problem – īelow and in the next link are explanations of what happened in the above comic.ĭatabases are accessed using a query language, typically Structured Query Language. The quoting delimits (identifies) a string of characters the quoting mechanism is removed and is not part of the string passed to the command. Single quotes, double quotes, and backslashes tell the shell which parts of command lines to treat as ordinary (not special) characters. 14 ADVANCED SHELL: eval: Using quotes inside shell variables.13 ADVANCED SHELL: Quoting for remote shells ( ssh).12 Using argv.sh to count command line arguments.11 Studies in Quoting Special Characters.10 Quotes inside variables are not special.7.2.4 Always double-quote variable expansions.7.2.3 Quoting text containing variables.7.2.2 Quoting text containing both single and double quotes.7.2.1 Quotes inside quotes are not meta-characters.7.2 How to quote text containing other quotes?.7 When to use single quotes, double quotes, backslashes.6 Shell Quote Processing is Left to Right.5 Quoting is removed from the argument being quoted.4 Three quoting mechanisms: double, single, backslash.3.1 Quoting used by other programs such as grep and find.3 Which programs have quoting mechanisms?.2.1 Why do we need a shell quoting mechanism?.2 Quoting – hiding characters from the shell.Allen – – Winter 2015 - January to Apil 2015 - Updated 12:03 EDT Shell Command Line Quoting Mechanisms Shell Command Line Quoting Mechanisms
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |