大约有 5,880 项符合查询结果(耗时:0.0261秒) [XML]

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How to use phpexcel to read data and insert into database?

...'; echo ' and ' . $highestRow . ' row.'; echo '<br>Data: <table border="1"><tr>'; //----- loop from all rows ----- for ($row = 1; $row <= $highestRow; ++ $row) { echo '<tr>'; echo "<td>".$row."</td>"; //--- read each...
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Why can't I use switch statement on a String?

...nse, they are used as an index (after subtracting the lowest value) into a table of instruction pointers—the tableswitch instruction. If the constants are sparse, a binary search for the correct case is performed—the lookupswitch instruction. In de-sugaring a switch on String objects, both i...
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SQL - Select first 10 rows only?

... In SQL server, use: select top 10 ... e.g. select top 100 * from myTable select top 100 colA, colB from myTable In MySQL, use: select ... order by num desc limit 10 share | improve this ...
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Select something that has more/less than x character

...L Server, Use the LEN (Length) function: SELECT EmployeeName FROM EmployeeTable WHERE LEN(EmployeeName) > 4 MSDN for it states: Returns the number of characters of the specified string expression, excluding trailing blanks. Here's the link to the MSDN For oracle/plsql you can use Leng...
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Is it a good idea to index datetime field in mysql?

.... In my application I will have many rows for example I currently have one table with 4 million records. Most of my queries use datetime clause to select data. Is it a good idea to index datetime fields in mysql database? ...
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ERROR: permission denied for sequence cities_id_seq using Postgres

... Interesting. I did a GRANT all on the table that my sequence is in, but this doesn't seem to cover the sequence. This also seems to very by OS. – Kinnard Hockenhull Jun 7 '14 at 15:48 ...
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Should try…catch go inside or outside a loop?

...ch structures are placed. Internally, they are implemented as a code-range table in a structure that is created when the method is called. While the method is executing, the try/catch structures are completely out of the picture unless a throw occurs, then the location of the error is compared again...
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SQL Server Profiler - How to filter trace to only display events from one database?

...lumn and find out the correct values to enter by querying the sysdatabases table in the master database – Jim Birchall Nov 10 '08 at 8:39 35 ...
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MAC addresses in JavaScript

...ince any server-side programming language allows you do get access the ARP table, even indirectly (e.g. through a subprocess). I think "client-side language" would work better... – kirbyfan64sos Oct 6 '16 at 19:51 ...
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What Java ORM do you prefer, and why? [closed]

..._ID = a.ID); And how it can be expressed in jOOQ: // Alias the author table TAuthor a = T_AUTHOR.as("a"); // Use the aliased table in the select statement create.selectFrom(a) .whereExists(create.selectOne() .from(T_BOOK) .whe...