![]() ![]() ![]() This is the type of friction and challenges you have in moving from an ideological-bound to a commercial-bound enterprise. Monty has it other programmers in our own group – they're never going to be comfortable when you move away from free, open source software with no pricing. "Any company and open source that has ideological roots like MariaDB is always going to have issues with the commercialization strategy. Speaking to The Register at MariaDB's OpenWorks conference in New York last week, CEO Howard said the company was now faced with finding the balance between its open source roots and the needs of investors and lenders. Widenius continues to work for MariaDB on a contract basis and is involved with the open source community surrounding it, but is no longer the company's CTO. Critics contend MariaDB's approach is not truly open source because it does not allow users or developers to do what they want with the code. Meanwhile, other software, like the MariaDB Enterprise Server, is available on the MariaDB Enterprise Server is also GPL v2. MariaDB has adopted the Business Source License (BSL) for commercial products such as MaxScale database proxy. MySQL had been part of Sun Microsystems since 2008, but when Oracle bought Sun in 2010, Widenius forked the code to a new open source database, MariaDB. Without formally scripting a Stored Procedure, this is as good as it is going to get.MariaDB was sharded out of MySQL, the open source relational database created by Michael "Monty" Widenius in 1995. The SELECT will let you see the generated SQL WHERE table_schema=DATABASE() AND table_name='foo' AND column_name IN Here is the Dynamic SQL to generate the same query USE mydbĬONCAT('SELECT ',column_name,' AS name FROM ',table_name) ![]() For this example, let's suppose the following If the intent is to select some columns and generate a single column list of the distinct values, then Dynamic SQL is needed to produce such a query. This would produce a distinct list of names. Nothing could be more elegant that using UNION SELECT her_name AS name FROM foo In this instance, what makes UNION an absolute must is the merging of three columns into a single column. : Calculating values from three related tables, without using join or union.Others have submitted answers trying aggregation to collect data without using UNION Where one of the dictionary views: SELECT (SELECT := 0) r, INFORMATION_SCHEMA.COLUMNS t Using a constant expression: select 1 line ![]() Using an auxiliary table: create table aux(line int) Of course there are different ways to create a table containing the three rows with values 1,2,3: Pivot Query: select elt(aux.line,foo.his_name,foo.her_name,foo.other_name) all_name Insert into foo(his_name,her_name,other_name) values ('four','five','six') Insert into foo(his_name,her_name,other_name) values ('one','two','three') MySQL 5.6 Schema Setup: create table foo ( Instead the ELT function one can use IF or CASE. Each query row can be filled by the appropriate data. Now we have three rows in our query for each row in the base table foo. We want to create 3 rows for each row of the foo table, so we create an auxiliary table containing three rowsĪnd (cross) join it to the foo table. So MySQL does not have such an "elegant" way to unpivot a table.Ī way to do such unpivoting without the use of UNION can be done buy using a join. So if table_references equals foo the query cannot contains more rows than the table foo. Neither the WHERE, GROUP BY, HAVING, LIMIT, SELECT, INTO, FOR UPDATE nor the LOCK IN SHARE MODE clause can increase the number of rows defined by the FROM clause. This is the syntax diagram of the select statement Oracle you can use the following statement to make columns to rows It is unclear to me what is a "more elegant way". ![]()
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