temp-tables

问题 Let say I have a table named 'products' and Model named 'Product'. 'products' table has 3 fields id,title,price,created I want to calculate cal_price (which varies per record and day of search) and create a temporary table with 4 fields i.e. id,title,price,cal_price with order by cal_price Now, all I want is to paginate this temporary table. using $this->paginate(); eg. table_products id title price created 3 demo1 23 2011-12-12 4 demo2 43 2011-12-13 56 demo3 26 2011-12-16 sort 'temp_table'

问题 I'm using a stored procedure in Mysql that creates 3 temporary tables that store records from database's tables, and then used to select the final result from those subset of stored records. The problem is that, though it's supposed that temp tables within stored procedures are unique for each MySQL session, I get mixed results from different invocations from the stored procedure. Let's explain the problem with a real case escenario: We got users A, B, C that access my website doing different

问题 I'm working with an Oracle 10g database, and I want to extract a group of records from one table, and then use that for pulling records out of a bunch of related tables. If this were T-SQL, I'd do it something like this: CREATE TABLE #PatientIDs ( pId int ) INSERT INTO #PatientIDs select distinct pId from appointments SELECT * from Person WHERE Person.pId IN (select pId from #PatientIDs) SELECT * from Allergies WHERE Allergies.pId IN (select pId from #PatientIDs) DROP TABLE #PatientIDs

问题 I need to get list columns of some temporary table (MyISAM) in MySQL in view like number column - name column . I need to know number of column with specific name. In advance, I can't know what is the number of column - I'm using dynamic sql with some variables to create temporary table. I can not use show columns... because I can't work with results of this function. I can't use INFORMATION_SCHEMA.COLUMNS because it does not contains columns of temporary table. Some ideas? Thanks in advance!

问题 I am executing a stored procedure via standard JDBC Connection using MS SQL Driver version 3.0 . I have found that when I create and insert data into a temporary table the stored procedure doesn't execute properly. The Java code won't throw a exception, but the javax.sql.ResultSet will be null . The point of failure in the stored procedure is when I un-comment the INSERT INTO #TBL CLM_NAME VALUES('VAL') When I execute the statement using SQL Studio Manager it executes without hassle and the

问题 I have a created a temporary table using the memory engine as followed: CREATE TEMPORARY TABLE IF NOT EXISTS some_text ( id INT DEFAULT 0, string varchar(400) DEFAULT '' ) engine = memory; When I insert rows into it I run into a #1114 error because the table is full. It explains in the mysql docs that changing the tmp_table_size and the max_heap_table_size don't do anything for increasing the size of user created temp tables, which is what I think I have here. How do I go about making this

问题 I have read that one should not analyze a temp table, as it screws up the table statistics for others. What about an index? If I put an index on the table for the duration of my program, can other programs using the table be affected by that index? Does an index affect my process, and all other processes using the table? or Does it affect my process alone? None of the responses have been authoritative, so I am offering said bribe. 回答1: Does an index effect my process, and all other processes

问题 Problem Background Generating and accessing data of a fixed column layout is easy. You can create local temp tables up-front, and populate them by calling stored procedures. On the other hand, if you want to generate data with a dynamic column layout, you must generally build an SQL statement dynamically and execute it with "exec sp_executesql". Since the data layout is unknown at run-time, you cannot create a temp-table up-front, and once inside the "exec sp_executesql" statement, any

问题 Where do temporary tables get stored in a database? I want to drop a temporary table if it already exists. I can do this for securable tables by querying at information schema but I don't know where temporary tables are stored. 回答1: Temporary tables are stored in tempdb Database. There are various ways to check if a temp table exists outlined here: Check If Temporary Table Exists. 回答2: Temporary tables gets stored in tempdb database which is present in SystemDatabase or SystemDatabase ->

问题 I currently have a temporary table like so DBName API50 CounterValue NULL NULL 1 test1 34.5 NULL NULL NULL 2 test1 38.5 NULL I want a script which will make my temporary table as below DBName API50 CounterValue test1 34.5 1 test1 38.5 2 回答1: If your table has a primary key, and you always want to associate the CounterValue field with the next field in the table, you can do a self-join: SELECT t1.DBName, t1.API50, t2.CounterValue FROM MyTable t1 INNER JOIN MyTable t2 ON t1.PrimaryKey -1 = t2