db2 sql stored procedure examples

◆ Advantages:The execution speed is faster. The stored procedure is compiled only when it is created. Generally, the SQL statement is compiled every time it is executed. Therefore, the execution speed of stored procedures is faster.When stored procedures are used to process

next from city_cursor into @ Field// Assign the actual ID to the variableWhile (@ fetch_status = 0)// Starts the loopBeginIf @ result =''Select @ result = convert (nvarchar (2), count (*) from ajaxcounty where Cityid = @ Field ElseSelect @ result = @ result + ',' + convert (nvarchar (2), count (*) from ajaxcounty where Cityid = @ Field Fetch next from city_cursor into @ Field// The next cityidEndClose city_cursor// Close the cursorDeallocate city_cursor// Release cursor referenceGo Execut

in the office automation system with 10 million data .) For sorting columns and extracting gid, fariqi, and title fields, take pages 1st, 10, 100, 500, 1000, 10 thousand, 0.1 million, and 0.25 million as examples, test the execution speed of the preceding three paging schemes: (unit: milliseconds) Page number scheme 1 Scheme 2 scheme 31 60 30 7610 46 16 63100 1076 720 130500 540 12943 831000 17110 470 25010000 24796 4500 140100000 38326 42283 1553250

Many friends may have been using SQL Server for development for some time, but have not or rarely used the stored procedures in the project, perhaps some friends think that there is no need to use stored procedures and so on. In fact, when you finish the maintenance phase of a project, you will find that the stored pro

fariqi descselect O. GID, O. mid, O. title, O. fadanwei, O. fariqi from tgongwen o, @ indextable twhere O. gid = T. NID and T. id> @ pagelowerboundand T. ID The above stored procedures use the latest SQL server technology-Table variables. It should be said that this stored procedure is also a very good paging

Many programmers friends see SQL as the Flood Lake Beast, in fact, in-depth analysis, more time and patience, SQL is understandable.This article is mainly for new contact with the new friend of SQL, a simple SQL stored procedure t

Recently, due to work needs, from an applicationProgramExport a CSV data table and then import it to the ms SQL data table of another application environment, because it involves the import of multiple CSV export filesTherefore, a stored procedure is written to give it some flexibility. You can specify the path where the CSV file is

cursorFetch next from city_cursor into @ field // assign the actual ID to the variableWhile (@ fetch_status = 0) // starts the loopBeginIf @ result =''Select @ result = convert (nvarchar (2), count (*) from ajaxcounty where cityid = @ FieldElseSelect @ result = @ result + ',' + convert (nvarchar (2), count (*) from ajaxcounty where cityid = @ FieldFetch next from city_cursor into @ field // The next cityidEndClose city_cursor // close the cursorDeallocate city_cursor // release cursor reference

A stored procedure is one or more SQL commands that are stored as executable objects in the database.Definitions are always abstract. A stored procedure is actually a set of SQL stateme

SQL Common efficient paging code (stored procedure with SQL injection) You can see that the above stored procedure is the final concatenation of a number of steps into a SQL string, an

When writing a stored procedure in Oracle, a large SQL statement is sometimes used, but when viewed with the Pl/sql tool test you cannot see the SQL, and the discovery can be handled through an Oracle physical temporary table. Add dbms_output.put_line ('

I didn't talk about the stored procedure in the university. After working for a period of time, I still didn't use the stored procedure. I don't need to write the stored procedure at all. Maybe it's the reason for developing the s

SQL server Stored Procedure syntaxDefinition is always abstract. The stored procedure is actually a set of SQL statements that can complete certain operations, but these statements are stored