Can any one depict a simple example for using temporary tables in stored procedure for updating two tables in mysql?
Two kind of temporary tables available. One is session based and the other one is global temporary table.
Below is the simple example:
Select A,b,c into #MyTemp From MyDbTable
In the above example, #myTemp is the temporary table that you are creating. MyDbTable is the one that exist in your database. You can create multiple temporary tables.
I would suggest reading the article from here: Link
--Create a temp table and insert all these counts in it
Create Table #OperatorReportCount(Id int identity,Particulars varchar(100),NoOfArticles int)
--Insert these values in table
Insert Into #OperatorReportCount(Particulars,NoOfArticles) Values('Articles processed',#ProcessedArticleCount)
Insert Into #OperatorReportCount(Particulars,NoOfArticles) Values('Articles approved',#ArticlesApproved)
Insert Into #OperatorReportCount(Particulars,NoOfArticles) Values('Articles rejected',#ArticleRejectedCount)
Insert Into #OperatorReportCount(Particulars,NoOfArticles) Values('Rejections recieved',#RejectionsRecievedCount)
Insert Into #OperatorReportCount(Particulars,NoOfArticles) Values('Articles put on hold',#ArticlesOnHoldCount)
--Select the operator count table
Select Particulars,NoOfArticles From #OperatorReportCount
Related
I have a table with two columns (ldap, name). I want to be able to full text search any of those columns with the library FTS4. Here I have a couple of statements I'm using to create the virtual table but when I create a statement using Match the result is empty although it should return data.
CREATE VIRTUAL TABLE IF NOT EXISTS sales_rep USING FTS4(ldap,name, content="__sales_rep");
CREATE TRIGGER IF NOT EXISTS __sales_rep___after_insert AFTER INSERT ON __sales_rep BEGIN INSERT INTO sales_rep (ldap, name) VALUES (new.ldap, new.name);END;
I am inserting a row (ldap, name) VALUES ('test', 'Bryan');
But using
SELECT * FROM sales_rep where name MATCH 'Bry';
The result is empty
Inserting data in an external content FTS table requires to provide explicitly a value for the docid, which should be the rowid of the content table.
In your case you need to change the trigger :
CREATE TRIGGER __sales_rep___after_insert
AFTER INSERT ON __sales_rep
BEGIN
INSERT INTO sales_rep (docid, ldap, name)
VALUES (new.rowid, new.ldap, new.name);
END;
I created a persistent table temp and a temporary table temp, that is, both have the same name. How can I use select/update/insert specifically to the persistent or the temporary table? How can I differ between them?
MariaDB Tutorial says:
Note − Temporary tables are permitted to have the same name as an existing non-temporary table because MariaDB views it as a difference reference.
So, I suppose it should be possible to refer to one of these tables. This question is related to this question I posed in SO, but goes one step back.
In case a temporary table has the same name as an existing non temporary table the temporary table will shadow the name of a non temporary table.
That means in a SQL statement you will not be able to reference the non temporary table.
A work around would be, to create a view on a non temporary table before creating the temporary table, since the view internally keeps the reference to the non temporary table:
CREATE TABLE t1 (a VARCHAR(100));
INSERT INTO t1 VALUES ("foo");
CREATE VIEW v_t1 AS SELECT a FROM t1;
CREATE TEMPORARY TABLE t1 (b VARCHAR(100));
INSERT INTO t1 VALUES ("bar");
SELECT * FROM v_t1;
SELECT * FROM t1;
I have a requirement that I need to store a list of parameters. The parameters will be input as a csv file. They will be inserted into a table if not already existing. I have got a suggestion that I can import this data into a volatile table and use a sql query like:
insert into table permvariables
select * from tempvariables
minus
select * from permvariables;
Where tempvariables is my volatile table and permvariables is my permanent table. Will this solution work? Is there a better way to do it?
Instead of MINUS simply use a
MERGE INTO permvariables AS tgt
USING tempvariables AS src
ON tgt.pk_column(s) = src.pk_column(s)
WHEN NOT MATCHED INSERT VALUES (src.pk_column(s), src.cola, ...)
I want create table from another table with constraint?
I used this query "create table destination as select * from source;" fro table creation.
But its copy only the column name in table without column constraint.
There is a special table named sqlite_master, holding the full CREATE TABLE statement for each table (it's modified as appropriate during ALTER TABLE).
I would make my application retrieve that CREATE TABLE statement:
SELECT sql FROM sqlite_master WHERE type='table' AND name='source';
Then I would replace the table name right after CREATE TABLE tokens, and execute the result as a new sqlite query.
I don't think that it's possible to do in sqlite's pure SQL without extensions.
I m working on a project using oracle client and plsql for testing optimizing tuning etc. Here is the thing,this is a university course project so i m asked to create some tables then run some queries(and then optimize etc),and we have 2 options doing it.Either from linux terminal either from plsql.I create the tables from terminal in the database using sqlplus,then run the queries in plsql,but i have no results(it's like the rows are empty,but they are not). I did some search but i cant find a solution. If you need to know more details tell me.
Thanks in advance.
Are you saying that you create your table in a sqlplus session, insert data into it, and then run a separate session where you're querying the tables using plsql?
If so, are you committing your work after performing the insert?
For example, if you're doing this in sqlplus:
create table foo (id number, value varchar(255), primary key (id));
insert into foo (id, value) values (1, 'bar');
insert into foo (id, value) values (2, 'baz');
commit;
Then you should be to see the 2 rows in the table foo in another session. However, if you're not doing the commit then the new table will be visible to another session but it will appear to be empty.