Hing Kwan

PostgreSQL中没有substring_index方法，在做一个项目迁移的时候，需要类似MySQL的substring_index方法。从网上找了相关代码。如下：CREATE OR REPLACE FUNCTION substring_index(varchar, varchar, integer)RETURNS varchar AS $$  DECLARE    token

---- instr functions that mimic Oracle's counterpart-- Syntax: instr(string1, string2, [n], [m]) where [] denotes optional parameters.---- Searches string1 beginning at the nth character for t

PostgreSQL中没有substring_index方法。实现代码如下：[code="sql"]CREATE OR REPLACE FUNCTION substring_index(varchar, varchar, integer)RETURNS varchar AS $$ DECLARE tokens varchar[]; length integ...

PostgreSQL模仿Oracle的instr函数：[code="sql"]---- instr functions that mimic Oracle's counterpart-- Syntax: instr(string1, string2, [n], [m]) where [] denotes optional parameters.---- Searches s...