CREATE COLLATION case_insensitive ( PROVIDER = icu, LOCALE = 'zh_Hans', DETERMINISTIC = false ); SELECT * FROM test ORDER BY c1 COLLATE "case_insensitive"; 使用citext模块: citext是一个扩展模块,允许你在PostgreSQL中创建大小写不敏感的文本类型列。 sql CREATE EXTENSION citext; CREATE TABLE test...
bill@bill=> CREATE COLLATION case_insensitive (provider = icu, locale = 'zh_Hans', deterministic = false); CREATE COLLATION bill@bill=> select * from test order by c1 collate "case_insensitive"; c1 --- a A b B c C (6 rows) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. ...
今天的讨论不涉及数据库名,表名的大小写,仅仅讨论一下字段里面的值的大小写。我们以一个例子为开始,1 我们创建一个表create table Case_insensitive ( id serial not null primary key, address va PostgreSQL 大小写 数据库 数据 转载 网络安全专家 2月前...
krb_caseins_users | off | Sets whether Kerberos and GSSAPI user names should be treated as case-insensitive. krb_server_keyfile | FILE:/mnt/hgfs/pginstaller.pune/server/staging/linux-x64/etc/postgresql/krb5.keytab | Sets the location of the Kerberos server key file. lc_collate | zh_CN....
Writing the case-insensitive queries is a crucial task to do in order to perform effective searching/matching in PostgreSQL. There are four methods to write the case-insensitive matching. The first one is by using the ILIKE operator, and the second in using the CITEXT extension. Using the LOW...
DECLARE name [BINARY] [INSENSITIVE] [NO SCROLL] CURSOR [{WITH | WITHOUT} HOLD] FOR query [FOR READ ONLY] 函数 从表中删除行. DELETE FROM [ONLY] table [[AS] alias] [USING usinglist] [WHERE condition | WHERE CURRENT OF cursor_name ] 丢弃 丢弃会话的状态. DISCARD { ALL | PLANS | ...
case_citext_opt3 ( id INT PRIMARY KEY, name CITEXT ); If you’re migrating data from a system that uses case-insensitive text types, using citext can simplify the migration process by allowing you to maintain the same data format. citext can help prevent data entry errors or inconsistencies...
sighup | krb_caseins_users | Sets whether KerberosandGSSAPIusernames should be treatedascase-insensitive. sighup | krb_server_keyfile | Sets thelocationofthe Kerberosserverkey file. sighup | ssl | Enables SSL connections. sighup | ssl_ca_file |Locationofthe SSL certificate authority file. ...
MySQL中排序规则utf8_general_ci不区分大小写,ci为case insensitive的缩写,即大小写不敏感.比如,主键内容为A,插入a将是不允许的,而查找a是可以查到A的.也就是说,A和a在字符判断中被当做一样来处理.排序规则根据特定语言和区域设置的标准指定对字符串数据进行排序和比较的规则. 排序规则的概念,以PHP的intl扩展举...
https://oracle-base.com/articles/12c/column-level-collation-and-case-insensitive-database-12cr2 https://docs.oracle.com/en/database/oracle/oracle-database/12.2/refrn/ALL_TAB_COLS.html#GUID-85036F42-140A-406B-BE11-0AC49A00DBA3 https://blog.csdn.net/weixin_29944865/article/details/11477319...