case-sensitive

问题 I work with utf-8 strings. They should be stored in a MySQL database table. That's why I decided to choose some of utf-8 collations for several columns. Now I see the choice in not as clear as I guessed. The problem is the SELECT statement should be case sensitive. But it is not. The first option is to choose another utf-8 collation (the only non-ci collation is utf8_bin as far as I see). Is it a solution? The second one is to use BINARY in the SELECT statement: select col1, col2 from table1

问题 I work with utf-8 strings. They should be stored in a MySQL database table. That's why I decided to choose some of utf-8 collations for several columns. Now I see the choice in not as clear as I guessed. The problem is the SELECT statement should be case sensitive. But it is not. The first option is to choose another utf-8 collation (the only non-ci collation is utf8_bin as far as I see). Is it a solution? The second one is to use BINARY in the SELECT statement: select col1, col2 from table1

问题 I have an Access database set up on a domain hosting service. I am connecting to it through SQL. However, I need all of my queries to be case sensitive, and as far as I know the way the server is set up on the hosting service is it's NOT case sensitive. Is there a certain command that I could use in my SQL which would make the query case sensitive? 回答1: I think you can add collate after the WHERE clause. SELECT col FROM table WHERE col COLLATE Latin1_General_CS_AS = 'value' 回答2: Do you need

问题 I have a table that originates in an old legacy system that was case senstive, in particular a status column where 's' = 'Schedule import' and 'S' = 'Schedule management'. This table eventually makes its way into a SQL Server 2000 database which I can query against. My query is relatively simple just going for counts... Select trans_type, count(1) from mytable group by trans_type This is grouping the counts for 'S' along with the 's' counts. Is there any way to force a query to be cap

问题 Are indices (indexes) defined as UNIQUE case sensitive in MySQL? 回答1: It depends on the collation of the field - if it's ci (case insensitive) or cs (case sensitive). The unique index would apply accordingly. 回答2: You can make a column case-sensitive by using this syntaxis. the unique index also will be case-sensitive. ALTER TABLE tbl_name MODIFY col_name column_definition [CHARACTER SET charset_name] [COLLATE collation_name] Example: ALTER TABLE `tablename` MODIFY `column` VARCHAR(100)

问题 Are indices (indexes) defined as UNIQUE case sensitive in MySQL? 回答1: It depends on the collation of the field - if it's ci (case insensitive) or cs (case sensitive). The unique index would apply accordingly. 回答2: You can make a column case-sensitive by using this syntaxis. the unique index also will be case-sensitive. ALTER TABLE tbl_name MODIFY col_name column_definition [CHARACTER SET charset_name] [COLLATE collation_name] Example: ALTER TABLE `tablename` MODIFY `column` VARCHAR(100)

问题 I encountered this "bug" in the latest verison of firefox and I don't know what causes this behavior and which is the correct result. HTML <div><h1 id="heading">First Title</h1></div><div><h1>Second Title</h1></div> JavaScript var allDivNodes = document.getElementsByTagName("div"); console.log(allDivNodes[0].childNodes); console.log(allDivNodes[1].childNodes); console.log(allDivNodes[0].childNodes.length); console.log(allDivNodes[1].childNodes.length); The result I get is the following: And

问题 I encountered this "bug" in the latest verison of firefox and I don't know what causes this behavior and which is the correct result. HTML <div><h1 id="heading">First Title</h1></div><div><h1>Second Title</h1></div> JavaScript var allDivNodes = document.getElementsByTagName("div"); console.log(allDivNodes[0].childNodes); console.log(allDivNodes[1].childNodes); console.log(allDivNodes[0].childNodes.length); console.log(allDivNodes[1].childNodes.length); The result I get is the following: And

问题 I am using Heroku and his PostgreSQL addon. When I login to pg:psql and do: SELECT table_name FROM information_schema.tables WHERE table_schema='public'; I see all my tables: Users Cities Registrations Which is expected. But when I do: select * from users; Result is : ERROR: relation "users" does not exist LINE 1: select * from users; Does anyone knows what am I doing wrong? 回答1: Classic problem with mixed case identifiers. Try: select * from "Users"; Read the chapter Identifiers and Key

问题 I have a huge file in this layout: world12345:Betaalpha world12344:alphabeta world12343:ZetaBeta world12342:!betatheta I need to convert the first lowercase letter after the ":" to uppercase and the first uppercase letter to lowercase. I've tried using notepad++ and emeditor, but I'm not that experienced with regex. This is how I want it to become after (regex?) world12345:betaalpha world12344:Alphabeta world12343:zetaBeta world12342:!betatheta (unchanged, as the first char is a special char)