convert real/double precision to string to_char(125.8::real, ‘999D9’) to_char(numeric, text) text convert numeric to string to_char(-125.8, ‘999D99S’) to_date(text, text) date convert string to date to_date(‘05 Dec 2000’, ‘DD Mon YYYY’) to_number(text, text) numeric c...
函数:initcap(string)说明:Convert the first letter of each word to uppercase and the rest to lowercase. Words are sequences of alphanumeric characters separated by non-alphanumeric characters. 将字符串所有的单词进行格式化,首字母大写,其它为小写 例子:initcap('hi THOMAS') = Hi Thomas 函数:length(...
1、postgresql 数据类型转换,日期操作函数各种数据类型(日期/时间、integer、floating point和numeric)转换成格式化的字符串以及反过来从格式化的字符串转换成指定的数据类型。下面列出了这些函数,它们都遵循一个公共的调用习 惯:第一个参数是待格式化的值,而第二个是定义输出或输出格式的模板。函数返回类型描述例子to_...
把numeric转换成字串 to_char(-125.8, '999D99S')to_date(text, text)date 把字串转换成日期 to_date('05 Dec 2000', 'DD Mon YYYY')to_timestamp(text, text)timestamp 把字串转换成时间戳 to_timestamp('05 Dec 2000', 'DD Mon YYYY')to_timestamp(double)timestamp 把UNIX纪元转换成时间戳 ...
The objective of this write-up is to learn how to convert a string into a number using different examples. So, let’s get started! What is the Need for Converting a String into a Number in PostgreSQL? Suppose we have a numeric value residing in the string data type (i.e., numeric ...
convert(string using conversion_name) text 使用指定的转换名字改变编码。 convert('PostgreSQL' using iso_8859_1_to_utf8) 'PostgreSQL' lower(string) text 把字串转化为小写 lower('TOM') tom octet_length(string) int 字串中的字节数 octet_length('jose') 4 overlay(string placing string from int ...
PostgreSQL provides a CAST operator that assists us in converting one data type to another. For instance, you can convert a numeric string into an integer, string to double precision, string to boolean, etc. The CAST() operator takes an expression/column and a data type. Consequently, it ...
例子:encode(E'123\\000\\001','base64')=MTIzAAE=函数:initcap(string) 说明:Convertthe first letterofeach wordtouppercaseandthe resttolowercase. Words are sequencesofalphanumeric characters separatedbynon-alphanumeric characters. 将字符串所有的单词进行格式化,首字母大写,其它为小写 ...
to_number(text, text) numeric 转换字符串为数字 to_number('12,454.8-', '99G999D9S') to_timestamp(text, text) timestamp 转换为指定的时间格式 time zone convert string to time stamp to_timestamp('05 Dec 2000', 'DD Mon YYYY') to_timestamp(double precision) timestamp 把UNIX纪元转换成时...
String sort order LC_CTYPE 字符分类 LC_MESSAGES 消息的语言 LC_MONETARY 货币使用的格式 LC_NUMERIC 数字使用的格式 LC_TIME 时间日期使用的格式 您可以利用这些特性,按本土化需求,输出对应的顺序或者格式。本文将通过示例介绍如何设置数据库的本土化信息以及如何设置输出结果按中文的...