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How to organize a node app that uses sequelize?
...rdinarily you would use select from two or more tables, or a union in pure SQL, you would have to run separate queries, and with the async nature of Node it's just added complexity.
Therefore I moved away from using Sequelize. Moreover I am switching from using ANY data fetching from DB in the mod...
Bulk insert with SQLAlchemy ORM
Is there any way to get SQLAlchemy to do a bulk insert rather than inserting each individual object. i.e.,
10 Answers
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Does Entity Framework Code First support stored procedures?
...E" statements in your code.
For EF 4.2:
var customers = context.Database.SqlQuery<Customer>("select * from customers")
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ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...条请牢记：
■计划好哪个连接是DTE，哪个是DCE，它们各包括什么类型，牢记你在这两台电脑上各使用了哪个端口（1还是2）。
■制作正确的null modem线。制作null modem线有多种方法，采用不同的方法做出来的线都是不一样的。
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What is the difference between UNION and UNION ALL?
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Both UNION and UNION ALL concatenate the result of two different SQLs. They differ in the way they handle duplicates.
UNION performs a DISTINCT on the result set, eliminating any duplicate rows.
UNION ALL does not remove duplicates, and it therefore faster than UNION.
Note: While us...
Transaction marked as rollback only: How do I find the cause
...is exception while running my application.
Finally the problem was on the sql query. i mean that the query is wrong.
please verify your query. This is my suggestion
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Mapping composite keys using EF code first
Sql server table:
4 Answers
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MySQL - UPDATE query based on SELECT Query
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You can actually do this one of two ways:
MySQL update join syntax:
UPDATE tableA a
INNER JOIN tableB b ON a.name_a = b.name_b
SET validation_check = if(start_dts > end_dts, 'VALID', '')
-- where clause can go here
ANSI SQL syntax:
UPDATE tableA SET validation_c...
MYSQL Truncated incorrect DOUBLE value
When the SQL query below is executed:
10 Answers
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Unable to cast object of type 'System.DBNull' to type 'System.String`
...ed to check against normal "null" value. The DBNull.Value would work for a SqlDataReader or a SqlParameter - but not for this object here.
– marc_s
May 15 '09 at 20:27
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