assign value to variable in sql select statement

Record: The SQL statement looks for a column that is worth the maximum value.1. For example, I'm looking for the maximum value of column A in table A:The lookup statement can be written like this: "Select Max (a) A from a"2. Findi

Source: Get dynamic SQL query statement return value (sp_executesql)When writing stored procedures, you often encounter the need to splice SQL statements, generally only to perform the post-stitching statements using EXEC (@sql).Today, a stored procedure needs to get the res

SQL statement query table name/column name/primary key/Auto grow value in database ----A table created by a user in a query database ----JSJ01 as database name Select name tablename from JSJ01. sysobjects where type= ' U ' and name not in (' dtproperties ') --field information in the query table ---docs as table n

Of course, the first reaction is to use a stored procedure. Determine the original value of this field, and then update. A rough search on the web did not find a solution. I have a very interesting result when I do it, and I don't even have a where. The bit type assignment to the database is done using SQL statements and different input from the admin interface. Admin interface input must be filled in with

', ' TRANSFER ', null, ' 1455564464 ');INSERT into ' status_detail_test ' VALUES (' 8 ', ' 1 ', ' complete ', NULL, ' 1455670471 ');SELECTa.ID as trade_id,A.create_at as Trade_create_at,b.ID as status_final_id,B.status_name,B.create_at as Status_create_atFromTrade_test as A,Status_detail_test as BWHEREb.trade_id = a.IDandB.create_at = (select Max (create_at) from Status_detail_test)anda.ID = 1--Refer to a simple example:Http://zhidao.baidu.com/link?u

Query out data, and add data that is not present in the list, and the values of this column are equalSelect App_id,app_secret from Wx_ticket Group by app_id;The data that is queried isapp_id | Expires_in--------------------+------------WXEEC89CDF2D435D10 | 7200WXEEC89CDF2D435D10 | 7200wx9b7bfb5f59df5009 | 7200wx9b7bfb5f59df5009 | 7200wx649ae9eecb72227d | 7200wx649ae9eecb72227d | 7200When using select ' 20150429 ' Date,app_id,app_secret from Wx_ticket

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