mySession.SQL("SET @my_var = 10;").Execute(); mySession.SQL("CALL my_add_one_procedure(@my_var);").Execute(); mySession.SQL("DROP PROCEDURE my_add_one_procedure;").Execute(); // Use an SQL query to get the result var myResult = mySession.SQL("SELECT @my_var").Execute();...
The SQL Scripts page appears. Searching and Replacing Text or Regular Expressions Clicking theFindbutton in the Script Editor displays the Find and Replace with fields at the top of the page. Use these fields to search for and replace text strings and JavaScript regular expressions within a script...
优化器方面index_merge_intersection参数不建议关闭,理由是只要数据驻扎在入内存中,对于性能影响不大,所以有足够的内存分配到innodb buffer pool的时,保持默认值; 但对于一些特定的SQL语句情况,需要交集优化器选项。 测试当中,发现条件语句里不管有多少个索引可用,intersect 只选择2个索引; 如上案例,建议是联合索引方式。
Standalone with no dependencies. Works with most of SQL databases out there including (SQL Server, MYSQL, SQLITE, PostgreSQL, Cockroachdb) Built-in RESTful server Built-in RESP Redis Protocol, you connect to SQLer using any redis client Built-in Javascript interpreter to easily transform the ...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 select name from teacher where deptinNULL;--注意不能使用dept=NULL Note the INNER JOIN misses the teachers with no department and the departments with no teacher. inner join能够排除老师为空的系或者没有系的老师 ...
Connect to the PDB in question and execute the following anonymous PL/SQL block as a user withSYSDBAprivileges: Copy code snippet Copied to Clipboard Error: Could not Copy Copied to Clipboard Error: Could not Copy BEGIN -- step 1: allow HTTP access to the PROXYDBMS_NETWORK_ACL_ADMIN.APPEND...
db.prepare(): Prepares a SQL statement for parameterized queries, reducing the risk of SQL injection. .run(): Executes the prepared statement with the provided parameters. .get(): Fetches a single row matching the query conditions. Advantages of using SQLite with Bun ...
You can read more about creating JavaScript modules in Oracle Database 23ai inchapter 3 of the JavaScript Developer's Guide. Expose the module's functionality to PL/SQL and SQL With the module successfully created in the schema, the hardest part is completed. The Validator module ex...
JavaScript object notation (JSON) files. Parquet files. The basic syntax for querying is the same for all of these types of file, and is built on the OPENROWSET SQL function; which generates a tabular rowset from data in one or more files. For example, the following query could...
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.