sql -- 创建一个大小写敏感的表 CREATE TABLE "CaseSensitiveTable" ( "CaseSensitiveColumn" INT ); -- 插入数据 INSERT INTO "CaseSensitiveTable" ("CaseSensitiveColumn") VALUES (1); -- 查询数据(注意使用双引号) SELECT "CaseSensitiveColumn" FROM "CaseSensitiveTable"; 注意事项: 使用双引号会使标...
2. Case-Insensitive Matching: column_name ~* 'regex_pattern' 3. Negation: !~ for "does not match" (case-sensitive). !~* for "does not match" (case-insensitive). Example 1: Basic Regex Pattern Matching This example searches for rows in the users table where the email column contains e...
But now we have another problem: theusernamecolumn is still case-sensitive. This means that yourWHEREclause will differentiate uppercase/lowercase characters. SELECT*FROMusersWHEREusername='john';-- ---+--- name | username-- ---+--- John Doe | john-- ---+--- (1 row)SELECT*FROMusers...
synonym模板还有一个可选的参数CaseSensitive,其默认值为false。当CaseSensitive为false时,同义词文件中的词被折叠成小写,这和输入记号一样。当它为true时,词和记号将不会被折叠成小写,但是比较时就好像被折叠过一样。 一个星号(*)可以被放置在配置文件中一个同义词的末尾。这表示该同义词是一个前缀。当项被用...
CaseSensitivity CI 指定不区分大小写,CS 指定区分大小写。 AccentSensitivity AI 指定不区分重音,AS 指定区分重音。 KanatypeSensitive Omitted 指定不区分大小写,KS 指定区分假名类型。 WidthSensitivity Omitted 指定不区分大小写,WS 指定区分大小写。 BIN
Identity column –show you how to use the identity column. Alter table –modify the structure of an existing table. Rename table –change the name of the table to a new one. Add column –show you how to add one or more columns to an existing table. Drop column –demonstrate how to dr...
data has occurred in the lower casing if we have used case-sensitive queries. But there might be some cases where the term is present but in upper case letters or even one upper case letter. The data associated with that term will not be returned by the research result in this case. ...
(column_name), ',') || ') FROM a WHERE b.id = 123 AND a.id = b.id' FROM information_schema.columns WHERE table_name = 'a' -- table name, case sensitive AND table_schema = 'public' -- schema name, case sensitive AND column_name <> 'id' -- all columns except id ); END...
2.Searched CASE CASEWHENboolean-expressionTHENstatements [WHENboolean-expressionTHENstatements ... ] [ELSEstatements ]ENDCASE; 3.LOOPS of PL/SQL 3.1 LOOP for LOOP, it is often used with EXIT ,CONTINUE ,which is just like "break" and "continue" in C for a loop. ...
Fixed an issue where the name column in the sys.sysobjects view was using case sensitive collation. Fixed an issue to refer SQL objects inside a function and is resolved to the function's schema rather than the default schema of the user. Fixed an issue where a backend crash can occur whe...