大约有 40,000 项符合查询结果(耗时:0.0357秒) [XML]

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How can I select from list of values in SQL Server

...g them: [MS official] https://docs.microsoft.com/en-us/sql/t-sql/queries/table-value-constructor-transact-sql http://www.sql-server-helper.com/sql-server-2008/row-value-constructor-as-derived-table.aspx share | ...
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PostgreSQL - fetch the row which has the Max value for a column

I'm dealing with a Postgres table (called "lives") that contains records with columns for time_stamp, usr_id, transaction_id, and lives_remaining. I need a query that will give me the most recent lives_remaining total for each usr_id ...
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How many characters can UTF-8 encode?

... According to this table* UTF-8 should support: 231 = 2,147,483,648 characters However, RFC 3629 restricted the possible values, so now we're capped at 4 bytes, which gives us 221 = 2,097,152 characters Note that a good chunk of those chara...
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SQL Server query - Selecting COUNT(*) with DISTINCT

In SQL Server 2005 I have a table cm_production that lists all the code that's been put into production. The table has a ticket_number, program_type, and program_name and push_number along with some other columns. ...
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How to implement a Map with multiple keys? [duplicate]

...nother solution is to use Google's Guava import com.google.common.collect.Table; import com.google.common.collect.HashBasedTable; Table<String, String, Integer> table = HashBasedTable.create(); The usage is really simple: String row = "a"; String column = "b"; int value = 1; if (!table.c...
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org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for

I'm using Hibernate for all CRUD operations in my project. It doesn't work for One-To-Many and Many-To-One relationships. It gives me the below error. ...
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What do the terms “CPU bound” and “I/O bound” mean?

... 363.64 166.67 2.18 MARK RESULTS TABLE Mark Name MultiCore SingleCore Scaling ----------------------------------------------- ---------- ---------- ---------- CoreMark-PRO 18743....
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How does one reorder columns in a data frame?

...ec] return(data) } Now the OP's request becomes as simple as this: table <- data.frame(Time=c(1,2), In=c(2,3), Out=c(3,4), Files=c(4,5)) table ## Time In Out Files ##1 1 2 3 4 ##2 2 3 4 5 arrange.vars(table, c("Out"=2)) ## Time Out In Files ##1 1 3 2 4 ##2...
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Doctrine2: Best way to handle many-to-many with extra columns in reference table

...port AppBundle yml still generate manyToMany relation for the original two tables and simply ignore the third table instead of concidering it as an entity :/ – Stphane Mar 18 '15 at 23:24 ...
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Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]

...ing through the use of the same encryption key that encrypted it. Rainbow Table - a lookup table that contains all variations of characters hashed in a specific hashing algorithm. Salt - a known random string appended to the original string before it is hashed. For the .NET Framework, Bcrypt does...