12/28/2022 0 Comments Count condition in crystal report 10![]() The Command Editor cannot “see” parameters that are created in the Field Explorer for the report. ![]() Parameters that are used in a Command MUST be created in the Command Editor. Instead, the syntax of the SQL Expression should be used in the Command itself as either an additional “field” in the Select clause or as part of the Where clause.ġ. It is not possible to create or use SQL Expressions in the Field Explorer for the report when using a Command. Just like when a Command is joined to tables or other Commands, this can significantly slow down report processing. When the Select Expert is used against a command, Crystal is once again unable to push the filter down to the database and instead pulls all of the data into memory and processes the filter there. As a consequence, joining Commands to tables or other Commands can significantly slow down report processingĪny data filtering MUST be done in the Where clause of the Command. With inner joins, this frequently means that much more data is brought into memory than will actually be used on the report. ![]() Instead, all of the data from the Command along with all of the data from the tables is pulled into memory where Crystal will process the join in memory. When a Command is linked in the Database Expert with other tables or Commands, Crystal is unable to push the joins to the database for processing. What follows are some best practices for working with Commands in Crystal.Ī Command should include ALL of the data required in a report. Crystal formulas cannot be used in a command, so any calculations or filters must use SQL syntax. So, for example, when connecting to MS SQL Server, the “getDate()” function is used to get the current date but in Oracle it would be “SysDate”. To determine whether a Command can be created for a specific type of connection, open the connection in Crystal the first line under the name of the open connection will be “Add Command”.Ĭommands use the SQL syntax of the database that is being connected to. Commands are available for most, but not all, databases. A Command is a SQL Select statement that the user can write to extract data for a report. In version 9 and newer Crystal has a feature called a “Command”.
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