標籤:建立一個函數建立一個trigger, 將表和函數綁定?ALTER TRIGGER trigger_name ON table_nameRENAME TO new_name;?ALTER TRIGGER last_name_changes ON employeesRENAME TO log_last_name_changes;?ALTER TABLE table_nameDISABLE TRIGGER trigger_name| ALLYou specify the trigger
標籤:CREATE OR REPLACE view_nameAS queryDROPVIEW[IFEXISTS]view_name;一個複雜的 query:SELECT cu.customer_id AS id,????(((cu.first_name)::text || ‘ ‘::text)||(cu.last_name)::text) AS name,????a.address,????a.postal_code AS "zip
標籤:CREATE TABLE products ( product_no integer, name text, price numeric CONSTRAINT positive_price CHECK (price > 0));CHECK 返回bool 值。外鍵參照完整性、參考完整性A foreign key constraint specifies that the values in a column (or a group of columns) must
標籤:--對於分區表constraint_exclusion 這個參數需要配置為partition或onpostgres=# show constraint_exclusion ; constraint_exclusion ---------------------- partition --建立父子表, 用於儲存分區資料create table t(id int primary key);create table t1(like t including all)
標籤:pgsql 分區表:--主表create table test(id integer, name varchar(32));create index idx_test_id on test using btree(id);--分表create table test_b (like test including constraints including defaults including indexes) inherits(test);create table test_c (like
標籤:原文地址:http://blog.chinaunix.net/uid-20684384-id-1895247.html1. 設定遠端存取認證機制編輯 $POSTGRES/data/pg_hba.conf 檔案,# TYPE DATABASE USER CIDR-ADDRESS METHOD# IPv4 local connections:host all all 127.0.0.1/32 md5
標籤:前言:最近做資料同步,需要從PostgreSql擷取資料,發現一旦資料比較多,那麼讀取的速度非常慢,並且記憶體佔用特別多&GC不掉。代碼範例:為了方便講解,下面寫了案例代碼,從b2c_order擷取資料,這個資料表6G左右。package com.synchro;import java.sql.*;/** * Created by qiu.li on 2015/10/16. */public class Test { public static void