'I am a string in single quotes' "I am a string in double quotes" PHP语法分析器是用成对的引号来判断一个字符串的。因此,所有字符串必须使用同一种单或者双 引号来定义开始和结束。例如,下面的字串定义是不合法的: "I am not a valid string since I have unmatching quote marks' 'Me neither!"...
说明:Return the given string suitably quoted to be used as a string literal in an SQL statement string. Embedded single-quotes and backslashes are properly doubled. 对字符串里两边加上单引号,如果字符串里面出现sql编码的单个单引号,则会被表达成两个单引号 例子:quote_literal('O\'Reilly') = 'O'...
函数:quote_literal(string text)说明:Return the given string suitably quoted to be used as a string literal in an SQL statement string. Embedded single-quotes and backslashes are properly doubled. 对字符串里两边加上单引号,如果字符串里面出现sql编码的单个单引号,则会被表达成两个单引号 例子:quote_...
All these functions return the given string suitably quoted to be used as an identifier in an SQL statement string. In the function QUOTE_IDENT, Quotes are added only if necessary. In function QUOTE_LITERAL, embedded single-quotes and backslashes are properly doubled. If a value is passed, c...
然后在 stackoverflow 上查到了这个相关问题:Insert text with single quotes in PostgreSQL。但是它的解决方案在我看来还是不太符合我的要求,毕竟写入 pg 的数据不能因为'报错就强制将单个'转为''。所以我就将'替换为’,发现执行还是报错,意识到关键问题不在这里。
(d.encoding)as"Encoding",d.datcollateas"Collate",d.datctypeas"Ctype",pg_catalog.array_to_string(d.datacl,E'\n')AS"Access privileges"FROMpg_catalog.pg_databasedORDERBY1;***ListofdatabasesName|Owner|Encoding|Collate|Ctype|Accessprivileges---+---+---+---+---+---postgres|postgres|UTF...
函数 string || string string || non-string or non-string || string bit_length(string) char_length(string) or character_length(string) lower(string) octet_length(string) overlay(string placing string from int [for int]) position(substring in string) substring(string [from int] [for int])...
In addition to standard_conforming_strings, the configuration parameters escape_string_warning and backslash_quote govern treatment of backslashes in string constants. The character with the code zero cannot be in a string constant. unicode输入格式2 格式2,刚好相反,反斜线不是转义字符时的unicode写法。
or a superuser chooses to create objects in it. schema的owner默认是该schema下的所有对象的owner,但是PostgreSQL又允许用户在别人的schema下创建对象,所以一个对象可能属于两个owner,而且schema 的owner有 drop对象的权限。 对于两个owner都有drop的权限,这个我个人认为是一个BUG。
说明：Stringconcatenation字符串连接操作 例子：'Post'||'greSQL' ＝ PostgreSQL 函数：string||non-stringornon-string||string 说明：Stringconcatenationwithonenon-stringinput字符串与非字符串类型进行连接操作 例子：'Value:'||42=Value:42 函数：bit_length(string) 说明：Numberofbitsinstring计算字符串...