大约有 48,000 项符合查询结果(耗时:0.0214秒) [XML]

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What does the “+” (plus sign) CSS selector mean?

... See adjacent selectors on W3.org. In this case, the selector means that the style applies only to paragraphs directly following another paragraph. A plain p selector would apply the style to every paragraph in the page. This will onl...
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How can I use optional parameters in a T-SQL stored procedure?

...ame varchar(25) = null, @Title varchar(25) = null AS BEGIN SELECT ID, FirstName, LastName, Title FROM tblUsers WHERE (@FirstName IS NULL OR (FirstName = @FirstName)) AND (@LastName IS NULL OR (LastName = @LastName )) AND (@Tit...
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How to fetch the row count for all tables in a SQL SERVER database [duplicate]

... EXEC sp_MSForEachTable @command1='INSERT #counts (table_name, row_count) SELECT ''?'', COUNT(*) FROM ?' SELECT table_name, row_count FROM #counts ORDER BY table_name, row_count DESC DROP TABLE #counts The output will be a list of tables and their row counts. If you just want the total row count...
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PostgreSQL: How to pass parameters from command line?

...3="'2010-11-12'" and then refer to the variables in sql as :v1, :v2 etc select * from table_1 where id = :v1; Please pay attention on how we pass string/date value using two quotes " '...' " share | ...
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Search text in fields in every table of a MySQL database

... If you have phpMyAdmin installed use its 'Search' feature. Select your DB Be sure you do have a DB selected (i.e. not a table, otherwise you'll get a completely different search dialog) Click 'Search' tab Choose the search term you want Choose the tables to search I have used this ...
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How do I put an 'if clause' in an SQL string?

... WHERE purchaseOrder_ID = '@purchaseOrder_ID' and not exists (SELECT * FROM itemsOrdered WHERE purchaseOrder_ID = '@purchaseOrdered_ID' AND status = 'PENDING' ) However, I might guess that you are looping at a higher level. To set all such v...
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Dump a mysql database to a plaintext (CSV) backup from the command line

... separated) files which can import into Excel, etc, quite easily: % echo 'SELECT * FROM table' | mysql -B -uxxx -pyyy database Alternatively, if you've got direct access to the server's file system, use SELECT INTO OUTFILE which can generate real CSV files: SELECT * INTO OUTFILE 'table.csv' ...
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Regex (grep) for multi-line search needed [duplicate]

I'm running a grep to find any *.sql file that has the word select followed by the word customerName followed by the word from . This select statement can span many lines and can contain tabs and newlines. ...
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PowerShell equivalent to grep -f

... The -Pattern parameter in Select-String supports an array of patterns. So the one you're looking for is: Get-Content .\doc.txt | Select-String -Pattern (Get-Content .\regex.txt) This searches through the textfile doc.txt by using every regex(one pe...
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SQL Server Linked Server Example Query

...a Linked Server in SSMS Object Explorer, right-click, and Script Table as, SELECT To, and New Query Editor Window. The resulting SELECT statement will include the correct, fully-qualified path to the table. I had a mystery database qualifier in working with Sybase and this gave me the correct name. ...