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Tag: IBM i SQL

Embedded SQLPosted onFebruary 16, 2016December 16, 2016

DB2 SQL CURSOR : COMMITMENT CONTROL

When you use COMMIT or ROLLBACK statements with CURSOR, the behavior of the CURSOR depends on whether or not it is declared using the WITH…

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Embedded SQLPosted onFebruary 16, 2016December 16, 2016

DB2 SQL CURSOR : POSITIONED UPDATE & DELETE

When processing a CURSOR, DB2 SQL give option to update or delete data in base table based on current position of CURSOR in result table.…

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Embedded SQLPosted onFebruary 15, 2016December 16, 2016

DB2 SQL CURSOR : SCROLLABLE CURSOR

A scrollable cursor is one defined with the SCROLL keyword. A scrollable cursor can move in both forward and backward directions. For a scrollable cursor,…

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Embedded SQLPosted onFebruary 15, 2016December 16, 2016

DB2 SQL CURSOR : SERIAL CURSOR

SERIAL CURSOR : A serial cursor is one defined without the SCROLL keyword. A serial cursor can only more in forward direction. For a serial…

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Embedded SQLPosted onFebruary 13, 2016December 16, 2016

DB2 SQL CURSOR : BASIC

SQL CURSORS Result Set of a SELECT Statement which returns more than one row is easy to view on SQL interface like STRSQL. But How…

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SQL BASICPosted onFebruary 13, 2016December 11, 2019

DB2 SQL SUBQUERIES

SUBQUERIES SQL SubQuery is a query which inside another query. You can include a subquery in a WHERE or HAVING clause by using a basic…

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IBM i SQLPosted onFebruary 13, 2016December 16, 2016

DB2 SQL GLOBAL VARIABLES

GLOBAL VARIABLES GLOBAL VARIABLES are database objects to save a single value at a time(like DTAARA object) They can be accessed and modified using SQL…

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SQL TABLE EXPRESSIONPosted onFebruary 13, 2016December 16, 2016

DB2 SQL TABLE EXPRESSION : COMMON TABLE EXPRESSION

COMMON TABLE EXPRESSION (CTE) Unlike NESTED TABLE EXPRESSION CTE is not specified in FROM clause of the query. But CTE is specified before the full-select…

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SQL TABLE EXPRESSIONPosted onFebruary 13, 2016December 16, 2016

DB2 SQL TABLE EXPRESSION : NESTED TABLE EXPRESSION

Nested table expressions(NTE) (also called derived tables) Basic syntax of SQL SELECT statement is like SELECT * FROM table-name Nested table expressions gives you option…

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SQL TABLE EXPRESSIONPosted onFebruary 13, 2016December 16, 2016

DB2 SQL TABLE EXPRESSION : BASIC

SQL TABLE EXPRESSION SQL TABLE EXPRESSION gives you power to create a temporary table inside a query. Life of this temporary table is only inside…

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IBM i SQLPosted onFebruary 13, 2016December 16, 2016

DB2 SQL GLOBAL TEMPORARY TABLE

Global Temporary Table DECLARE GLOBAL TEMPORARY TABLE gives you a handy option to create table in QTEMP lib with some very useful options. As DECLARE…

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IBM i SQLPosted onFebruary 13, 2016December 16, 2016

DB2 SQL MATERIALIZED QUERY TABLE

Materialized Query Table(MQT) A materialized query table is a table whose structure and definition is based on the result of a given query. Materialized query…

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SQL DB GENERATED SEQUENCEPosted onFebruary 12, 2016December 16, 2016

DB2 SQL DB GENERATED SEQUENCE : SEQUENCE OBJECT

SQL SEQUENCE OBJECT SEQUENCE OBJECT are similar to IDENTITY COLUMN in the way that they both generate unique values and use almost same attributes. However,…

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SQL DB GENERATED SEQUENCEPosted onFebruary 12, 2016December 16, 2016

DB2 SQL DB GENERATED SEQUENCE : ROWID

Using ROWID is another way to have the system assign a unique value to a column. ROWID is similar to IDENTITY COLUMNS. But rather than…

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SQL DB GENERATED SEQUENCEPosted onFebruary 11, 2016December 16, 2016

DB2 SQL DB GENERATED SEQUENCE : IDENTITY COLUMN

IDENTITY COLUMN An IDENTITY COLUMN is a numeric column defined in a table for which the column values can be generated automatically by DB2. Only…

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