single means quotes

SQL double quotes and single quotes Delimiters are used only for identifiers. Delimiters cannot be used for keywords, regardless of whether they are marked as reserved words in SQL Server.Quoted identifiers are separated by double quotation marks ("

single quotes, double quotes, and escape characters in PHP http://blog.csdn.net/river131/article/details/9186203Category: PHP notes 2013-06-27 11:37 875 people read Comments (0) Favorites report escape characters PHP PHP single and double quotes

The shell can recognize 4 different types of caret symbols: single quote character ' double quote character ' backslash character \ Inverted quote character ' 1. Single quotation mark (') # grep Susan Phonebook Susan Goldberg 403-212-4921 Susan

1. Single quotation mark (') # grep Susan Phonebook Susan Goldberg 403-212-4921 Susan Topple 212-234-2343 If we're looking for Susan Goldberg and can't use the grep Susan Goldberg Phonebook command directly, grep treats Goldberg and phonebook as

When using Oracle, I found that the use of single and double quotation marks is different. I checked some information online and summarized it myself: Double quotation marks: when an object is created, the object name, When using Oracle, I found

When the angel used Oracle, he found that the use of single and double quotation marks was different. Then he checked some information online and made some summary: Double quotation marks: when an object is created, the object name and field name

PHP single and double quotation marks can modify the string type of data, if the decorated string contains variables (example $name), The biggest difference is: double quotation marks will replace the value of the variable, and the single quotation

[Reprinted] differences between single quotes, double quotes, and anti-quotes in linux shell, linuxshell Linux shell can recognize four different types of leading characters: single quotes character 'double quotation marks character "backslash

Difference between single quotes and double quotes textarea has two rows of data. namesourceaaaaaaaaaaabbbbbbbbbbb I use explode (& quot; rn & quot;, $ _ POST [source]) two elements use explode (rn, $ _ POST [source]) and only one element. solution -

① escaped characters are different Escape characters (\) can be used in both single and double quotes, but only single quotes and escape escape characters that are enclosed in single quotes are escaped. If you enclose a string in double quotes (""),