I work with postgreSQL
I want to update email of all my users using sql
I have a table named user that contains 500 users,
so I think that I should use a loop in my sql syntax
For example when the table contains 4 users, I want the email for these users to become :
user1#hotmail.fr
user2#hotmail.fr
user3#hotmail.fr
user4#hotmail.fr
in java it should be like this
String newValue=null;
for(int i=0;i<list.size();i++)
{
newValue="user"+i+"#hotmail.fr";
// make update
}
I think that I should use plsql syntax
updated :
I try without success with this code :
BEGIN
FOR r IN SELECT * from user_
LOOP
NEXT r;
UPDATE user_ SET emailaddress = CONCAT('user',r,'#hotmail.fr')
END LOOP;
END
I solved the problem using this query :
UPDATE user_ SET emailaddress='user' || col_serial || '#hotmail.fr' FROM
(SELECT emailaddress, row_number() OVER ( ORDER BY createdate) AS col_serial FROM user_ ORDER BY createdate) AS t1
WHERE user_.emailaddress=t1.emailaddress
Related
I have ORDS 21 installed in a local 19c oracle database. I have created a stored procedure to list all the departments from the dept table with a cursor that lists the employees from the emp table. If I just list all departments and their employees the api works fine, but if I add a parameter to the query to specify which department, I get an error 17410 no data left .
Both queries are backed by plsql stored procedures. I have created many stored procedures using this same format with parameters and nested cursors before without a problem.
MWE for query that works:
create or replace procedure get_dept
as
l_cur sys_refcursor;
begin
open l_cur for
select d.deptno,d.dname,
cursor (select e.empno,e.ename
from emp e
where e.deptno = d.deptno
order by e.deptno,e.empno
) as employees
from dept d
order by d.deptno;
-- return the resultset in json format
apex_json.open_object;
apex_json.write('emps',l_cur);
apex_json.close_object;
end get_dept;
/
MWE for query that does not work:
create or replace procedure get_dept1
(
p_dept_no in varchar2
) as
l_cur sys_refcursor;
begin
open l_cur for
select d.deptno,d.dname,
cursor (select e.empno,e.ename
from emp e
where e.deptno = d.deptno
order by e.deptno,e.empno
) as employees
from dept d
where d.deptno = to_number(p_dept_no)
order by d.deptno;
-- return the resultset in json format
apex_json.open_object;
apex_json.write('emps',l_cur);
apex_json.close_object;
end get_dept1;
/
I want to delete all the records from QryCriteria where the CfgQryCriteriaId is the CfgQryCriteriaId from CfgQryCriteria
WHERE Criteria = 'PolicyAdministration.MDSL.Terms.LockInDate'
Below is what i have so far,can someone be of assistance?
BEGIN TRY
BEGIN TRANSACTION CFG
DELETE FROM QryCriteria
WHERE CfgQryCriteriaId = 'PolicyAdministration.MDSL.Terms.LockInDate'
END TRY
BEGIN CATCH
if(##TRANCOUNT >0)
ROLLBACK TRANSACTION CFG
END CATCH
An easy way is to use a subquery to get all of the appropriate CfgQryCriteria values:
delete from QryCriteria
where CfgQryCriteriaId in (
select COC.CfgQryCriteriaId from CfgQryCriteria as COC where COC.Criteria = 'PolicyAdministration.MDSL.Terms.LockInDate' );
A similar query could be constructed using where exists and a correlated subquery. A third choice would be deleting from an inner join between the two tables.
I need validate dynamic Fields from a Table. For example:
CREATE TRIGGER BU_TPROYECTOS FOR TPROYECTOS
BEFORE UPDATE AS
DECLARE VARIABLE vCAMPO VARCHAR(64);
BEGIN
/*In then table "TCAMPOS" are the fields to validate*/
for Select CAMPO from TCAMPOS where TABLA = TPROYECTOS and ACTUALIZA = 'V' into :vCAMPO do
Begin
if (New.:vCAMPO <> Old.:vCampo) then
/*How i get dynamic New.Field1, New.Field2 on query return*/
End;
END ;
The question is : How can I put "The name of the field that the query returns me " in the above code .
Ie if the query returns me the field1 and field5 , I would put the trigger
if ( New.Field1 < > Old.Field1 ) or ( New.Field5 < > Old.Field5 ) then
There is no such feature in Firebird. You will need to create (and preferably) generate triggers that will reference all fields hard coded. If the underlying table changes or the requirements for validation, you will need to recreate the trigger to take the added or removed fields into account.
I have History table and transaction table.....and reference table...
If status in reference table is CLOSE then take those record verify in History table if not there insert from transaction table..... wiring query like this .... checking better one... please advice.. this query can be used for huge data ?
INSERT INTO LIB1.HIST_TBL
( SELECT R.ACCT, R.STATUS, R.DATE FROM
LIB2.HIST_TBL R JOIN LIB1.REF_TBL C
ON R.ACCT = C.ACCT WHERE C.STATUS = '5'
AND R.ACCT NOT IN
(SELECT ACTNO FROM LIB1.HIST_TBL)) ;
If you're on a current release of DB2 for i, take a look at the MERGE statement
MERGE INTO hist_tbl H
USING (SELECT * FROM ref_tbl R
WHERE r.status = 'S')
ON h.actno = r.actno
WHEN NOT MATCHED THEN
INSERT (actno,histcol2, histcol3) VALUES (r.actno,r.refcol2,r.refcol3)
--if needed
WHEN MATCHED
UPDATE SET (actno,histcol2, histcol3) = (r.actno,r.refcol2,r.refcol3)
I'm trying to figure out a way to store metadata about a column without repeating myself.
I'm currently working on a generic dimension loading SSIS package that will handle all my dimensions. It currently does :
Create a temporary table identical to the given table name in parameters (this is a generic stored procedure that receive the table name as parameter, and then do : select top 0 * into ##[INSERT ORIGINAL TABLE NAME HERE] from [INSERT ORIGINAL TABLE NAME HERE]).
==> Here we insert custom code for this particular dimension that will first query the data from a datasource and get my delta, then transform the data and finally loads it into my temporary table.
Merge the temporary table into my original table with a T-SQL MERGE, taking care of type1 and type2 fields accordingly.
My problem right now is that I have to maintain a table with all the fields in it to store a metadata to tell my scripts if this particular field is type1 or type2... this is nonsense, I can get the same data (minus type1/type2) from sys.columns/sys.types.
I was ultimately thinking about renaming my fields to include their type in it, such as :
FirstName_T2, LastName_T2, Sex_T1 (well, I know this can be type2, let's not fall into that debate here).
What do you guyz would do with that? My solution (using a table with that metadata) is currently in place and working, but it's obvious that repeating myself from the systables to a custom table is nonsense, just for a simple type1/type2 info.
UPDATE: I also thought about creating user defined types like varchar => t1_varchar, t2_varchar, etc. This sounds like something a bit sluggy too...
Everything you need should already be in INFORMATION_SCHEMA.COLUMNS
I can't follow your thinking of not using provided tables/views...
Edit: As scarpacci mentioned, this somewhat portable if needed.
I know this is bad, but I will post an answer to my own question... Thanks to GBN for the help tho!
I am now storing "flags" in the "description" field of my columns. I, for example, can store a flag this way : "TYPE_2_DATA".
Then, I use this query to get the flag back for each and every column :
select columns.name as [column_name]
,types.name as [type_name]
,extended_properties.value as [column_flags]
from sys.columns
inner join sys.types
on columns.system_type_id = types.system_type_id
left join sys.extended_properties
on extended_properties.major_id = columns.object_id
and extended_properties.minor_id = columns.column_id
and extended_properties.name = 'MS_Description'
where object_id = ( select id from sys.sysobjects where name = 'DimDivision' )
and is_identity = 0
order by column_id
Now I can store metadata about columns without having to create a separate table. I use what's already in place and I don't repeat myself. I'm not sure this is the best possible solution yet, but it works and is far better than duplicating information.
In the future, I will be able to use this field to store more metadata, where as : "TYPE_2_DATA|ANOTHER_FLAG|ETC|OH BOY!".
UPDATE :
I now store the information in separate extended properties. You can manage extended properties using sp_addextendedproperty and sp_updateextendedproperty stored procedures. I have created a simple store procedure that help me to update those values regardless if they currently exist or not :
create procedure [dbo].[UpdateSCDType]
#tablename nvarchar(50),
#fieldname nvarchar(50),
#scdtype char(1),
#dbschema nvarchar(25) = 'dbo'
as
begin
declare #already_exists int;
if ( #scdtype = '1' or #scdtype = '2' )
begin
select #already_exists = count(1)
from sys.columns
inner join sys.extended_properties
on extended_properties.major_id = columns.object_id
and extended_properties.minor_id = columns.column_id
and extended_properties.name = 'ScdType'
where object_id = (select sysobjects.id from sys.sysobjects where sysobjects.name = #tablename)
and columns.name = #fieldname
if ( #already_exists = 0 )
begin
exec sys.sp_addextendedproperty
#name = N'Scd_Type',
#value = #scdtype,
#level0type = N'SCHEMA',
#level0name = #dbschema,
#level1type = N'TABLE',
#level1name = #tablename,
#level2type = N'COLUMN',
#level2name = #fieldname
end
else
begin
exec sys.sp_updateextendedproperty
#name = N'Scd_Type',
#value = #scdtype,
#level0type = N'SCHEMA',
#level0name = #dbschema,
#level1type = N'TABLE',
#level1name = #tablename,
#level2type = N'COLUMN',
#level2name = #fieldname
end
end
end
Thanks again