This section contains thecreate,insertand PL/SQL code to run the examples fromChapter 6, “Sorting and Grouping”in an Oracle 11gR2 database. Indexed Order By SELECT sale_date, product_id, quantity FROM sales WHEREsale_date >= TRUNC(sysdate) - INTERVAL '1' DAYORDER BY product_id Gathering...
652 rows deleted.Code language:SQL (Structured Query Language)(sql) D) Oracle DELETE – delete cascade In practice, you often delete a row from a table that has a foreign key relationship with rows from other tables. For example, you want to delete the sales order with id 1 from theorde...
Dr. Paul Dorsey, President, Dulcian, Inc., Oracle Magazine PL/SQL Developer of the Year 2007, and President Emeritus, New York Oracle Users Group This is a fascinating guide into the world of Oracle SQL with an abundance of well-collected examples. Without a doubt, this book is helpful ...
The connection URL of a connection factory must use the service name syntax and follow best practice by specifying a dynamic database service name and the JDBC URL structure (see examples above and below). No other URL formats provide high availability. The URL may use JDBC thin or JDBC OCI...
The simplest kind of dynamic SQL statement results only in "success" or "failure" and uses no host variables. Some examples follow: 'DELETE FROM table_name WHERE column_name = constant''CREATE TABLE table_name ...''DROP INDEX index_name''UPDATE table_name SET column_name = constant''GRAN...
Examples: --Avoid: WHERE serial_id = NVL(:a1, serial_id) WHERE NVL(serial_id,-1) = ( 1, etc...) 8. If you need to use SQL functions on join predicates that is okay, but do not use them with indexed table columns. 9. EXISTS vs. IN for sub queries If the selective predicate...
Oracle SQL supports date arithmetic in which integers represent days and fractions represent the fractional component represented by hours, minutes, and seconds. For example, adding .5 to a date value results in a date and time combination 12 hours later than the initial value. Some examples of...
pivot_in_clause: This is used to filter the values for the columns in the pivot_for_clause. Each of the values in this clause will be a separate column. If that’s confusing to you, don’t worry. The examples below will make it much easier to understand. ...
Oracle INSERT statement examples Let’screate a new tablenameddiscountsfor inserting data: CREATETABLEdiscounts ( discount_idNUMBERGENERATEDBYDEFAULTASIDENTITY, discount_nameVARCHAR2(255)NOTNULL, amountNUMBER(3,1)NOTNULL, start_dateDATENOTNULL, expired_dateDATENOTNULL);Code language:SQL (Structured Que...
The following material is from theOracle9i Database Administrator's Guide, we tested the examples on Oracle 9.0.1 for SUN Solaris and Windows 2000. Overview The ALTER SYSTEM statement allows you to set, change, or delete (restore to default value) initialization parameter values. When the ALTER...