说明:Convert string to dest_encoding. The original encoding is specified by src_encoding. The string must be valid in this encoding. Conversions can be defined by CREATE CONVERSION. Also there are some predefined conversions. See Table 9-7 for available conversions. 转换字符串编码,指定源编码与目...
regexp_split_to_table---A B C D (4rows) 参考: https://www.postgresql.org/docs/9.6/static/functions-aggregate.html https://www.postgresql.org/docs/9.6/static/functions-string.html
它的语法是regexp_split_to_array(string, pattern [, flags ])。这些参数和regexp_split_to_table的相同。 ELECT foo FROM regexp_split_to_table('the quick brown fox jumps over the lazy dog', E'\\s+') AS foo; foo --- the quick brown fox jumps over the lazy dog (9 rows) SELECT re...
5. (1 row) 2 行转列(regexp_split_to_table) 1. 2. 3. 4. 5. 6. 1. cqdb=> select regexp_split_to_table(name,',') from test; 2. regexp_split_to_table 3. --- 4. A 5. B 6. C 7. D 8. E 9. (5 rows) 1. 2. 3. 4. 5. 6. 7. 8. 9....
;array_agg --- {A,B,C} (1 row)⾏=》列 使⽤regexp_split_to_table函数 with tmp_t0 as (select 'A,B,C,D'::varchar as c1 )select regexp_split_to_table(c1,',')from tmp_t0 ;regexp_split_to_table --- A B C D (4 rows)参考：
t_girl=# select split_to_string('love,you,hate,number',',') as result;result---love you hate number(4rows) 1. 2. 3. 4. 5. 6. 7. 8. 第二种, 用自己带的正则函数来实现。 t_girl=# SELECT ytt FROM regexp_split_to_table('love,you,hate,number', E',+') AS ytt;ytt---lov...
RETURN 1+(LENGTH(f_string) - LENGTH(REPLACE(f_string,f_delimiter,'')));END$$ DELIMITER ;-- 得到具体下表的⼦字符。DELIMITER $$ CREATE DEFINER=`root`@`%` FUNCTION `func_get_split_string`(f_string VARCHAR(1000),f_delimiter VARCHAR(5),f_order INT) RETURNS VARCHAR(255) CHARSET utf8 ...
deptno|string_agg ---+--- 30|ALLEN,MARTIN 10|JASON 20|JONES (3 rows) 2、列转行:regexp_split_to_table postgres=#select*fromtest.test_str;no|name---+---1| a,b,c,d2| Jason Xian (2rows) 将列信息转换成行 postgres=#selectregexp...
Assumes no ';' in the fileNames var queries = fs.readFileSync(fileName).toString() .replace(/(\r\n|\n|\r)/gm," ") // remove newlines .replace(/\s+/g, ' ') // excess white space .split(";") // split into all statements .map(Function.prototype.call, String.prototype.trim...
gz | psql dbname 3)分割备份 pg_dump dbname | split -b 1m 4)恢复 cat filename* | psql dbname 4. copy 导入导出 语法COPY命令概述 代码语言:javascript 代码运行次数:0 运行 AI代码解释 copy 命令用于表与文件(和标准输出,标准输入)之间的相互拷贝; copy to 由表至文件,copy from 由文件至表; copy...