I wondered how works method getConnection() at DataSource? I assume that DataSource calling DriverManager.getConnection every time when we call DataSource.getConnection with our properties that we setting in DataSource. Is that true? Answer The answers to your question can be deduced from the DataSource javad…
Tag: jdbc
Spring jpa database connection for native query
I have a spring application that have to connect to a sql server db. There are no @Entity class and there ate no @Repository because the tables and the columns of the tables are unknown to the application. I have created a class and used an entity manager to execute queries, but I’m not sure this is the…
How can I use IN query with NamedParameterJdbcTemplate?
How can I use IN query with NamedParameterJdbcTemplate? I put ‘surname1′,’surname2′ and surname1’,’surname2 in params, so :surname would be ‘surname1′,’surname2’, but both didn’t work. When there was only gender parameter, it worked. How can I …
PrearedStatement executeUpdate() is not working
I’m new to JDBC and using the following code to update the row using MySQL JDBC driver. I have no idea why executeUpdate() is not updating the content in the database. Can anyone help me? Answer Your query string is wrong. It should be something like this: Look here for the proper syntax of update: http…
Provide SSL certificate to SQL Server via JDBC
The Microsoft JDBC SSL documentation details the use of a Java keystore in order to specify a certificate bundle to use when validating the TLS connection. Is there a way to provide a certificate bundle without needing to store it within a JKS when connecting to a SQL Server database? Postgres seems to have a…
How to get list of Map data using JDBCTemplate.queryForMap
How I can get proper return type of List<Map<String, Object>> mapList = jdbctemplate.queryForList(query)); Where my query is “SELECT * FROM table_name;”. Can anyone help me? Answer You can use the following snippet to get the required map from the list: mapList.stream().collect(Collect…
Mapping between DB2 XML CLOB data type and DB2 JDBC types are keep changing as upgrading to different JDBC versions
We were using com.ibm.db2.jcc.db2jcc4 v10.1 and recently we have upgraded it with the V11.1.4 FP5 driver for the z/OS Db2 systems. When we were using com.ibm.db2.jcc.db2jcc4 v10.1 the equivalent JDBC java class for DB2 XML CLOB was com.ibm.db2.jcc.am.ne and now after upgrading it with V11.1.4 FP5 driver now, …
Check if any value in list satisfies a condition
Suppose I have the following table called Seasons: … start_month end_month … 2 6 … 3 4 … … … I need to write a query which, for a given list of months, returns all the Seasons that satisfy the condition where at least 1 month in the list is: start_month <= month <= en…
How to elegantly convert from MSSQL Datetime2 to java.time.Instant
I have a simple spring boot REST API application, using plain jdbc to fetch data from a MSSQL DB. I am trying to figure out how best to retrieve a DATETIME2 column from the DB (which stores no timezone info), and serialize it as a UTC timestamp (and treat it as such in general in code). My DB server timezone
Universal solution to insert Userinput values in MySQL database with a priori unknown columns with Java and for example PreparedStatements
I want to insert a whole set of values in my table in MySQL (e.g. This works in MySQL Workbench 8.0 but not in my Java Code. I read the JavaDoc about prepared Statements but I didn’t find any clues on inserting values if I don’t know the type a priori. My Java code looks like this: I tried many