-- DB2 / Oracle / Postgres / ANSI Standard SELECT first_name || ' ' || last_name As full_name FROM customers; -- Sybase / SQL Server / Microsoft Access ... ... <看更多>

PostgreSQL extension adding HyperLogLog data structures as a native data type ... postgres=# select 1234 || hll_empty(); ERROR: operator does not exist: ... ... <看更多>

The PostgreSQL installers created by EnterpriseDB are designed to make ... PostgreSQL || PgAdmin4 ... ... <看更多>

In this PostgreSQL Tutorial, you will learn the following: Wild cards; Syntax; Using % wildcard; Using _ wildcard; Using NOT Operator; Using ... ... <看更多>

In Postgres 11 proisagg was replaced with prokind in the system catalog pg_proc : prokind | char | f for a normal function, p for a procedure, ... ... <看更多>

string_to_array函数的作用是将string类型的字符串分割成数组。 1, select string_to_array( ... ... <看更多>