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The Jakarta Persistence Query Language (JPQL; formerly Java Persistence Query Language) is a platform-independent object-oriented query language [1]: 284, §12 defined as part of the Jakarta Persistence (JPA; formerly Java Persistence API) specification. JPQL is used to make queries against entities stored in a relational database.
PreparedStatement allows the dynamic query to vary depending on the query parameter. [11] CallableStatement – CallableStatement is a subinterface of the Statement interface. [11] It is used for executing stored procedures on the database. [11] [12] Both input and output parameters must be passed into the database for stored procedures. [13]
In the above example, the application might supply the values "bike" for the first parameter and "10900" for the second parameter, and then later the values "shoes" and "7400". The alternative to a prepared statement is calling SQL directly from the application source code in a way that combines code and data.
They may be included in any order (see Examples below). Certain templates have the parameter "on" by default; see the main table for all alternate options. If a row renders identically to a previous row, it means the current template does not support that option and {{ tlg }} needs to be used instead.
A custom value for a parameter may be supplied by using |[parameter name]=[value] in place of |[parameter name]. Any formatting for such a value – including, for instance, italics – must be supplied as part of the value (e.g. |parameter=''value''<br/>). Custom values cannot be used for parameters whose names begin with an underscore ("_").
This template uses Module:Check for unknown parameters. All allowed parameters must be listed at {{#invoke:Check for unknown parameters|...}} in the template's own code. A call with an unlisted parameter may cause a warning in previews and may add a tracking category. There are two optional parameters preview and category.
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Query by Example (QBE) is a database query language for relational databases. It was devised by Moshé M. Zloof at IBM Research during the mid-1970s, in parallel to the development of SQL . [ 1 ] It is the first graphical query language, using visual tables where the user would enter commands, example elements and conditions.