 
-- create
CREATE TEMPORARY TABLE DDDS
(
  SchemeId varchar(1000) NOT NULL,
	OrgUnitId varchar(1000),		
	SchemeName varchar(1000),		
	SchemeSymbolId varchar(1000),			
	SymbolName varchar(1000),	
	SymbolValue varchar(1000),			
	Percentage	varchar(1000),
	Version varchar(1000)
);

CREATE TEMPORARY TABLE EDDS
(
  SchemeId varchar(1000) NOT NULL,
	OrgUnitId varchar(1000),		
	SchemeName varchar(1000),		
	SchemeSymbolId varchar(1000),			
	SymbolName varchar(1000),	
	SymbolValue varchar(1000),			
	Percentage	varchar(1000),
	Version varchar(1000),
	DateDeleted varchar(1000), 
	DeletedBy varchar(1000),
	LastModified varchar(1000)
);

Create TEMPORARY TABLE ValidOrgIds(
  OrgUnitId varchar(1000) NOT NULL
);

insert into ValidOrgIds values ('6606');
--insert into ValidOrgIds values ('6607');
--insert into ValidOrgIds values ('6609');

select * from ValidOrgIds;
-- insert
insert into DDDS values('1','6606','Scheme One','1','Present',
'P','100', '1');


insert into EDDS values('1','6606','Scheme One','1','Present',
'P','100', '1','','','2023-04-13T23:59:59.999Z');
insert into EDDS values('2','6609','Scheme One','1','Present',
'P','100', '1','','','2023-04-13T23:59:59.999Z');

-- fetch 
SELECT * FROM DDDS;
SELECT * FROM EDDS;

        SELECT
          DDDS.SchemeId AS DDDS_SchemeId,
          DDDS.OrgUnitId AS DDDS_OrgUnitId,
					DDDS.SchemeName AS DDDS_SchemeName,
					DDDS.SchemeSymbolId AS DDDS_SchemeSymbolId,
					DDDS.SymbolName AS DDDS_SymbolName,
					DDDS.SymbolValue AS DDDS_SymbolValue,
					DDDS.Percentage AS DDDS_Percentage,
					DDDS.Version AS DDDS_Version,

					EDDS.SchemeId AS EDDS_SchemeId,
          EDDS.OrgUnitId AS EDDS_OrgUnitId,
					EDDS.SchemeName AS EDDS_SchemeName,
					EDDS.SchemeSymbolId AS EDDS_SchemeSymbolId,
					EDDS.SymbolName AS EDDS_SymbolName,
					EDDS.SymbolValue AS EDDS_SymbolValue,
					EDDS.Percentage AS EDDS_Percentage,
					EDDS.Version AS EDDS_Version,
					EDDS.DateDeleted AS EDDS_DateDeleted,
					EDDS.DeletedBy AS EDDS_DeletedBy,
					EDDS.LastModified as EDDS_LastModified

        FROM
				  EDDS
        FULL OUTER JOIN
          DDDS
            ON
              DDDS.SchemeId = EDDS.SchemeId AND
							DDDS.SchemeSymbolId = EDDS.SchemeSymbolId
        WHERE
          (
						(
							-- Missing DDDS row
							(DDDS.SchemeId IS NULL OR
							DDDS.SchemeSymbolId IS NULL)

							AND
							(
								-- DDDS has hard deletes, but EDDS has soft deletes
								(EDDS.DateDeleted IS NULL OR EDDS.DateDeleted = '') OR
								(EDDS.DeletedBy IS NULL OR EDDS.DeletedBy = '')
							)
							
							AND
							
							EDDS.OrgUnitId IN (Select OrgUnitId from ValidOrgIds)
						)

						OR (
							-- Missing EDDS row
							EDDS.SchemeId IS NULL OR
							EDDS.SchemeSymbolId IS NULL
						)

						OR (
							-- Mismatched non-primary key columns
							DDDS.SchemeId = EDDS.SchemeId AND
							DDDS.SchemeSymbolId = EDDS.SchemeSymbolId AND
							(
								DDDS.OrgUnitId IS DISTINCT FROM EDDS.OrgUnitId OR
								DDDS.SchemeName IS DISTINCT FROM EDDS.SchemeName OR
								DDDS.SymbolName IS DISTINCT FROM EDDS.SymbolName OR
								DDDS.SymbolValue IS DISTINCT FROM EDDS.SymbolValue OR
								DDDS.Percentage IS DISTINCT FROM EDDS.Percentage OR
								DDDS.Version IS DISTINCT FROM EDDS.Version
							)
						)

						OR (
							-- EDDS says it's deleted, but DDDS still has that row
							(
								DDDS.SchemeId IS NOT NULL OR
								DDDS.SchemeSymbolId IS NOT NULL OR
								DDDS.Version IS NOT NULL
							)
							AND (EDDS.DateDeleted <> '' OR  EDDS.DeletedBy <> '' )
						)
					)

						-- ignore newer rows in EDDS
					AND (EDDS.LastModified <= '2023-08-31T23:59:59.999Z' OR EDDS.LastModified IS NULL)

created 1 year ago

PostgreSQL online editor

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About PostgreSQL

PostgreSQL is a open source relational database system and is also knows as Postgres.

Key Features:

Postgres is not only free and open-source but also it is highly extensible.
Custom Data types and funtions from various programming languaues can be introduced and the good part is compiling entire database is not required.
ACID(Atomicity, Consistency, Isolation, Durability) compliant.
First DBMS which implemented Multi-version concurrency control (MVCC) feature.
It's the default database server for MacOS.
It supports all major operating systems like Linux, Windows, OpenBSD,FreeBSD etc.

Syntax help

1. CREATE

CREATE command is used to create a table, schema or an index.

Syntax:

         CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

2. ALTER

ALTER command is used to add, modify or delete columns or constraints from the database table.

Syntax

ALTER TABLE Table_name ADD column_name datatype;

3. TRUNCATE:

TRUNCATE command is used to delete the data present in the table but this will not delete the table.

Syntax

TRUNCATE table table_name;

4. DROP

DROP command is used to delete the table along with its data.

Syntax

DROP TABLE table_name;

5. RENAME

RENAME command is used to rename the table name.

Syntax

ALTER TABLE table_name1 RENAME to new_table_name1;

6. INSERT

INSERT Statement is used to insert new records into the database table.

Syntax

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

7. SELECT

Select statement is used to select data from database tables.

Syntax:

SELECT column1, column2, ...
FROM table_name;

8. UPDATE

UPDATE statement is used to modify the existing values of records present in the database table.

Syntax

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

9. DELETE

DELETE statement is used to delete the existing records present in the database table.

Syntax

DELETE FROM table_name where condition;