The PostgreSQL lpad function is used to fill up a string of specific length by a substring. If the substring length is equal to the remaining main string length, it will fill up properly, but if less, the substring will repeat until it is not filling up, if longer than the remaining le...
position(substringtextINstringtext) →integer 返回指定的substring在string起始索引,如果不存在则返回零,。 position('om' in 'Thomas')→3 substring(stringtext[FROMstartinteger] [FORcountinteger] ) →text 如果已指定,提取string从start字符开始的子串, 并且在count字符后停止。如果已指定的话。 提供至少一个s...
数值类型的操作符 9.3. Mathematical Functions and Operators 字符串处理 9.4. String Functions and Operators 比特相关 9.6. Bit String Functions and Operators 通配符(规则表达式) 9.7. Pattern Matching 日期类型函数 格式化函数:9.8. Data Type Formatting Functions 操作函数:9.9. Date/Time Functions and Operator...
LTRIM, RTRIM and TRIM LTRIM, RTRIM and TRIM STR TO_CHAR REVERSE REVERSE REPLICATE LPAD REPLACE REPLACE STRING_SPLIT regexp_split_to_array or regexp_split_to_table STRING_AGG CONCAT_WS For more information, see String Functions and Operators in t...
split_part()函数支持负数下标,参考PostgreSQL: Documentation: 14: 9.4. String Functions and Operators 新增string_to_table()函数,将字符串拆分并转换为表,参考PostgreSQL: Documentation: 14: 9.4. String Functions and Operators substring()函数新增语法 SUBSTRING(text SIMILAR pattern ESCAPE escapechar) ...
This section discusses the JSON utility functions for getting types of JSONB values and formats JSON values into a human-readable format. jsonb_typeof() –Return the type of top-level JSON value as a text string. jsonb_pretty() –Format a JSON value into human-readable, indented format,...
mylib_sources = files( 'mylib.c', ) if host_system == 'windows' intarray_sources += rc_lib_gen.process(win32ver_rc, extra_args: [ '--NAME', '_int', '--FILEDESC', 'intarray - functions and operators for arrays of integers',]) endif mylib = shared_module('mylib', mylib...
\echo[STRING]writestringto standard output \i FILE execute commands fromfile\o [FILE] send all query results tofileor |pipe \qecho [STRING]writestringto query output stream (see \o) Informational (options: S= show system objects, + =additional detail) ...
postgresql数据库相比较MySQL或者oracle,一个是开源优势,另一个就是postgresql数据库的命令行更为丰富,因此,数据库的管理工作更为方便,快捷,尤其是postgresql的短命令就可以基本满足日常的数据库维护,管理工作了。 ###注:短命令通常是用在pg的命令行客户端的,也就是psql -U用户 -p 端口 -h 数据库IP 登陆数据...
postgresql查询集合结果⽤逗号分隔返回字符串处理的操作关键字：string_agg('' , '')例如：select string_agg(name||'' , ',') from sys_user 补充：PostgreSQL 字段⽤逗号 “，”隔开判断是否含有某个值 Array Functions and Operators -- --- -- Table structure for T_STUDENT -- --- DROP TABLE ...