PostgreSQL 常用函数

前端之家收集整理的这篇文章主要介绍了PostgreSQL 常用函数前端之家小编觉得挺不错的,现在分享给大家,也给大家做个参考。

http://PHP.net/manual/zh/ref.pgsql.PHP





注释

Note:

Not all functions are supported by all builds. It depends on your libpq (The Postgresql C client library) version and how libpq is compiled. If PHP Postgresql extensions are missing,then it is because your libpq version does not support them.

Note:

Most Postgresql functions acceptconnectionas the optional first parameter. If it is not provided,the last opened connection is used. If it doesn't exist,functions returnFALSE.

Note:

Postgresql automatically folds all identifiers (e.g. table/column names) to lower-case values at object creation time and at query time. To force the use of mixed or upper case identifiers,you must escape the identifier using double quotes ("").

Note:

Postgresql does not have special commands for fetching database schema information (eg. all the tables in the current database). Instead,there is a standard schema namedinformation_schemain Postgresql 7.4 and above containing system views with all the necessary information,in an easily queryable form. See the»PostgreSQL Documentationfor full details.

Table of Contents

原文链接:https://www.f2er.com/postgresql/196090.html

猜你在找的Postgre SQL相关文章