The following example uses the LTRIM() function to remove all the spaces from the string ' PostgreSQL': SELECT LTRIM(' PostgreSQL'); Output: ltrim --- PostgreSQL (1 row) Since the default of the second argument of the LTRIM() function is space, we don’t need to specify it. 3)...
RTRIM() function The PostgreSQL rtrim function is used to remove spaces( if no character(s) is provided as trimming_text ) or set of characters which are matching with the trimming_text, from the end of a string. Uses of RTRIM() Function Remove Trailing Spaces:Clean up trailing spaces fro...
USAGE_STRING+=" --new-systemd-unit We dropped this option for security reasons.Nowadays, please use the root-only script /usr/sbin/postgresql-new-systemd-unit.--datadir Dropped with --new-systemd-unit." USAGE_STRING+=" --upgrade-from-unit=UNIT Select proper unit name to upgrade from...
但一定要注意trim和concat的先后顺序select * from table_name where name like concat('%',trim(#{name}),'%')实体类如以下User实体类,我们可以通过重写set方法来实现public class User { private String name; private Stri
-- Remove leading and trailing spaces from the string using the TRIM() function TRIM(' Test Replace ') ), -- Specify the substring to be replaced ('test') and the replacement substring ('best') 'test', 'best' ) AS modified_string; ...
* if we created the data directory remove it too */ static void exit_nicely(void) { if (!noclean) { if (made_new_pgdata) { fprintf(stderr, _("%s: removing data directory \"%s\"\n"), progname, pg_data); if (!rmtree(pg_data, true)) ...
Return a string with all characters in lower or upper case. Use for presentation or to handle case insensitive expressions. SELECT LOWER('ABcd') 'abcd' LTRIM, RTRIM, and TRIM Remove leading and trailing spaces. SELECT LTRIM ('abc d ') 'abc d '...
cdata.set_quoted('PACKAGE_STRING', 'PostgreSQL @0@'.format(pg_version)) cdata.set_quoted('PACKAGE_TARNAME', 'postgresql') pg_version += get_option('extra_version') cdata.set_quoted('PG_VERSION', pg_version) cdata.set_quoted('PG_MAJORVERSION', pg_version_major.to_string()) ...
postgres 自增需要先进行创建自增序列, 指定自增值, 最小值, 最大值: CREATE SEQUENCE "public"....
The following example uses the REGEXP_REPLACE() function to remove redundant spaces: SELECT REGEXP_REPLACE('Your string with redundant spaces', '\s{2,}', ' ', 'g') AS cleaned_string; Output: cleaned_string --- Your string with redundant spaces (1 row) In this example, we use the ...