db2 stored procedure example

name, and they also have input and output parameters. Depending on the type of return value, we can divide a stored procedure into three categories: a stored procedure that returns a recordset, a stored procedure that returns a v

is a sequence of numbers automatically added by a database system in accordance with certain rules. This sequence is generally used as the surrogate primary key (because it is not duplicated) and has no other meaning. Sequence is the characteristic of database system, some databases implement sequence, others do not. For example, Oracle, DB2, PostgreSQL database implementation Sequence,mysql, SQL Server, S

be added to the database.Example two: Stored procedures for incoming parameters$sql = "CREATE Procedure Myproce2 (in score int) beginif score >=" pass "; Thenselect ' no '; end elseselect;"; mysql_query ($sql);//Create a myproce2 stored procedure $sql = "Call Test.myproce2 (70);"; mysql_query ($sql);//Call Myproce2

procedure and provide parameters (if the stored procedure has parameters; in general, SQL statements need to transmit the executed statement string to the database server, which is longer than the stored procedure to the database server;3) high security. Assigning values to

and another stored procedure definition, which has not been specifically studied5, stored procedures run with recompile recompilation For example, in the above stored procedure, after the temporary table definition, create an ind

operations (such as queries and modifications) on the same database object, if the Transaction-SQL statement involved in this operation is organized by the stored procedure, when the stored procedure is called on the client's computer, the call statement is transmitted on the network, which greatly increases network t

indexes, and need to be judged, the following principles are specific:A. For data columns that need to be queried quickly or frequently within a specified range, because the index is sorted and its specified range is contiguous, the query can take advantage of the sorting of the index to speed up the query time.B. The data columns that are often used in the WHERE clause, which is built during the collection of the WHERE clause, allow the data columns that frequently participate in the query to

while [label] ; (2). Loop loop [Label:] LOOPStatementsEND LOOP [label]; (3). Repeat until cycle [Label:] REPEATStatementsUNTIL expressionEND REPEAT [label] ; Five. Other common commands1.show Procedure StatusDisplays basic information about all stored procedures in the database, including the owning database, stored

as output parameters. RecompileIt indicates that SQL server does not save the execution plan of the stored procedure, and the stored procedure needs to be re-compiled every time it is executed. EncryptionSQL Server encrypts the syscomments table. The text field of this table contains the

_ Test_GetData ';$ Query = mysql_query ("call $ spname ()", $ conn) or die ("[$ spname] Query failed:". mysql_error ());While ($ row = mysql_fetch_array ($ query )){Echo $ row ['provinceid']. ':'. $ row ['provincename']; // output the dataset}} Catch (Exception $ e ){Echo $ e;} Type 4: Call a method with multiple returned result sets (currently only implemented through mysqli ~~) The code is as follows: // PHP$ Rows = array ();$ Db = new mysqli ($ server, $ user

Store common or complex tasks in advance with SQL statements and a specified name, to enable the database to provide services with the same functions as the predefined stored procedure, you only need to call execute to automatically complete the command. Advantages of Stored Procedures 1. the stored

temporary process, you can add two identifier (# procedure_name) before procedure_name ). The complete name (including # Or #) cannot exceed 128 characters. The name of the specified process owner is optional.　　; NumberIs an optional integer used to group processes with the same name, so that the same group of processes can be removed with a drop procedure statement. For example, the process used by an app