*函数:quote_literal(string text) 说明:Return the given string suitably quoted to be used as a string literal in an SQL statement string. Embedded single-quotes and backslashes are properly doubled. 对字符串里两边加上单引号,如果字符串里面出现sql编码的单个单引号,则会被表达成两个单引号 例子:quo...
y :=1;whiley<=len2 loop car_str :=car_str||quote_literal(array2[y])||','; y :=y+1;endloop;--sql 拼接sql :='select road_number, sum(frequency) from heat_map where date_key >='''||time1||'-01''and date_key <='''||time2||'-20''and vin in ('||rtrim(car_str,'...
javascript AI代码解释 SELECT format( 'CREATE TYPE %s AS ENUM (%s);', enumtypid::regtype, string_agg(quote_literal(enumlabel), ', ') ) FROM pg_enum GROUP BY enumtypid; 收藏分享票数3 EN 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持 原文链接: https://stackoverfl...
您需要像这样使用plpgsql: CREATE OR REPLACE FUNCTION public.backup(filepath character varying) RETURNS void LANGUAGE plpgsqlAS $function$ BEGIN -- Export data to csv EXECUTE 'COPY ( SELECT * FROM table_name) TO ' || quote_literal(filePath) || ' WITH CSV DELIMITER '','' HEADER'; RETURN;...
您需要像这样使用plpgsql: CREATE OR REPLACE FUNCTION public.backup(filepath character varying) RETURNS void LANGUAGE plpgsqlAS $function$ BEGIN -- Export data to csv EXECUTE 'COPY ( SELECT * FROM table_name) TO ' || quote_literal(filePath) || ' WITH CSV DELIMITER '','' HEADER'; RETURN;...
car_str :=car_str||quote_literal(array2[y])||','; y :=y+1; end loop; -- sql 拼接sql :='select road_number, sum(frequency) from heat_map where date_key >= '''|| time1 ||'-01...
本节描述了用于检查和操作字符串数值的函数和操作符。在这个环境中的字符串包括所有 character, character varying, text 类型的值。除非另外说明,所有下面列出的函数都可以处理这些类型,不过要小心的是,在使用 character SQL 定义了一些字符串函数,它们有指定的语法(用特定的关键字而不是逗号来分隔参数)。详情请见表...
问在Postgres中添加默认值为常量的列EN我想修改一个现有的表，以添加一个列，该列将一个大字符串定义...
(Serial) FunctionscurrvallastvalnextvalString Functions||asciichrinitcaplengthlowerlpadltrimmd5positionquote_identquote_literalregexp_matchesregexp_replaceregexp_split_to_arrayregexp_split_to_tablerepeatreplacerpadrtrimsplit_partstrpossubstrtrimupperDatabase Globalscurrent_datecurrent_timecurrent_timestampcurren...
Mirror of the official PostgreSQL GIT repository. Note that this is just a *mirror* - we don't work with pull requests on github. To contribute, please see https://wiki.postgresql.org/wiki/Submitting_a_Patch - postgres/doc/src/sgml/nls.sgml at master ·