大约有 47,000 项符合查询结果(耗时:0.0276秒) [XML]

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CSS disable text selection

Currently, I have put this in the body tag to disable text selections: 9 Answers 9 ...
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T-SQL: Opposite to string concatenation - how to split string into multiple records [duplicate]

...12)) RETURNS table AS RETURN ( WITH Pieces(pn, start, stop) AS ( SELECT 1, 1, CHARINDEX(@sep, @s) UNION ALL SELECT pn + 1, stop + 1, CHARINDEX(@sep, @s, stop + 1) FROM Pieces WHERE stop > 0 ) SELECT pn, SUBSTRING(@s, start, CASE WHEN stop > 0 THE...
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How do I get the current time zone of MySQL?

...bal and client-specific time zones can be retrieved like this: mysql> SELECT @@global.time_zone, @@session.time_zone; Edit The above returns SYSTEM if MySQL is set to slave to the system's timezone, which is less than helpful. Since you're using PHP, if the answer from MySQL is SYSTEM, you ca...
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Query to count the number of tables I have in MySQL

... SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = 'dbName'; Source This is mine: USE databasename; SHOW TABLES; SELECT FOUND_ROWS(); ...
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Drop all tables whose names begin with a certain string

...n one in the database. DECLARE @cmd varchar(4000) DECLARE cmds CURSOR FOR SELECT 'drop table [' + Table_Name + ']' FROM INFORMATION_SCHEMA.TABLES WHERE Table_Name LIKE 'prefix%' OPEN cmds WHILE 1 = 1 BEGIN FETCH cmds INTO @cmd IF @@fetch_status != 0 BREAK EXEC(@cmd) END CLOSE cmds; DEA...
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How to check if a Constraint exists in Sql server?

... try this: SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS WHERE CONSTRAINT_NAME ='FK_ChannelPlayerSkins_Channels' -- EDIT -- When I originally answered this question, I was thinking "Foreign Key" because the o...
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Correct way to use StringBuilder in SQL

...: StringBuilder sb = new StringBuilder(some_appropriate_size); sb.append("select id1, "); sb.append(id2); sb.append(" from "); sb.append(table); return sb.toString(); Note that I've listed some_appropriate_size in the StringBuilder constructor, so that it starts out with enough capacity for the f...
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Why would someone use WHERE 1=1 AND in a SQL clause?

...mple code to Greg's answer: dim sqlstmt as new StringBuilder sqlstmt.add("SELECT * FROM Products") sqlstmt.add(" WHERE 1=1") ''// From now on you don't have to worry if you must ''// append AND or WHERE because you know the WHERE is there If ProductCategoryID <> 0 then sqlstmt.AppendForm...
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Row count with PDO

... $sql = "SELECT count(*) FROM `table` WHERE foo = ?"; $result = $con->prepare($sql); $result->execute([$bar]); $number_of_rows = $result->fetchColumn(); Not the most elegant way to do it, plus it involves an extra query...
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In SQL, how can you “group by” in ranges?

...version. Here are the correct versions of both of them on SQL Server 2000. select t.range as [score range], count(*) as [number of occurences] from ( select case when score between 0 and 9 then ' 0- 9' when score between 10 and 19 then '10-19' else '20-99' end as range from scores)...