I have a query which I am trying to test. The query should update the data if it finds data in the table with existing primary key. If it doesn't then insert into the table.
The Primary key is of type int and in the properties I can see Identity is set to "True" which I assume it means that it will automatically set the new id for the primary if it is inserted.
MERGE INTO Test_table t
USING (SELECT 461232 ID,'Test1-data' Fascia FROM Test_table) s
ON (t.ID = s.ID)
WHEN MATCHED THEN
UPDATE SET t.Fascia = s.Fascia
WHEN NOT MATCHED THEN
INSERT (Fascia)
VALUES (s.Fascia);
The issue here is this query doesn't work and it never inserts the data or updates. Also, query gets compiled and I don't get any compilation error
Also the reason I want this query is to work because then I will use Java prepared statement to query the database so I am assuming I can do
SELECT ? ID,? Fascia FROM Test_table
So that I can pass the values with set methods in java.
Please let me know if there is something wrong in my query.
You are selecting from the target table as your source.
You either need to remove your FROM Test_table or have at least 1 row in Test_table prior to your merge.
rextester demo: http://rextester.com/XROJD28508
MERGE INTO Test_table t
USING (SELECT 461232 ID,'Test1-data' Fascia --FROM Test_table
) s
ON (t.ID = s.ID)
WHEN MATCHED THEN
UPDATE SET t.Fascia = s.Fascia
WHEN NOT MATCHED THEN
INSERT (Fascia)
VALUES (s.Fascia);
Related
I have an SQLite database. I am trying to insert values (users_id, lessoninfo_id) in table bookmarks, only if both do not exist before in a row.
INSERT INTO bookmarks(users_id,lessoninfo_id)
VALUES(
(SELECT _id FROM Users WHERE User='"+$('#user_lesson').html()+"'),
(SELECT _id FROM lessoninfo
WHERE Lesson="+lesson_no+" AND cast(starttime AS int)="+Math.floor(result_set.rows.item(markerCount-1).starttime)+")
WHERE NOT EXISTS (
SELECT users_id,lessoninfo_id from bookmarks
WHERE users_id=(SELECT _id FROM Users
WHERE User='"+$('#user_lesson').html()+"') AND lessoninfo_id=(
SELECT _id FROM lessoninfo
WHERE Lesson="+lesson_no+")))
This gives an error saying:
db error near where syntax.
If you never want to have duplicates, you should declare this as a table constraint:
CREATE TABLE bookmarks(
users_id INTEGER,
lessoninfo_id INTEGER,
UNIQUE(users_id, lessoninfo_id)
);
(A primary key over both columns would have the same effect.)
It is then possible to tell the database that you want to silently ignore records that would violate such a constraint:
INSERT OR IGNORE INTO bookmarks(users_id, lessoninfo_id) VALUES(123, 456)
If you have a table called memos that has two columns id and text you should be able to do like this:
INSERT INTO memos(id,text)
SELECT 5, 'text to insert'
WHERE NOT EXISTS(SELECT 1 FROM memos WHERE id = 5 AND text = 'text to insert');
If a record already contains a row where text is equal to 'text to insert' and id is equal to 5, then the insert operation will be ignored.
I don't know if this will work for your particular query, but perhaps it give you a hint on how to proceed.
I would advice that you instead design your table so that no duplicates are allowed as explained in #CLs answer below.
For a unique column, use this:
INSERT OR REPLACE INTO tableName (...) values(...);
For more information, see: sqlite.org/lang_insert
insert into bookmarks (users_id, lessoninfo_id)
select 1, 167
EXCEPT
select user_id, lessoninfo_id
from bookmarks
where user_id=1
and lessoninfo_id=167;
This is the fastest way.
For some other SQL engines, you can use a Dummy table containing 1 record.
e.g:
select 1, 167 from ONE_RECORD_DUMMY_TABLE
While executing this code in my project:
Integer countObj = (Integer) ht.findByCriteria(criteria.setProjection(Projections.rowCount())).get(0);
I get the following exception:
com.microsoft.sqlserver.jdbc.SQLServerException: Column "PRODUCT_TASK.PRODUCT_TASK_ID" is invalid in the ORDER BY clause because it is not contained in either an aggregate function or the GROUP BY clause."
Here I am using two tables.
Product_task with product_task_id as primary key
Product_info with product_info_id as primary key
product_info_id is the foreign key for Product_task.
By executing that query I will get count.
I am getting this SQL query in my logs:
select count(*) as Count from PRODUCT_TASK pt inner join
PRODUCT_INFO pin on pt.PRODUCT_INFO_ID=pin.PRODUCT_INFO_ID
where pin.UPC like ? order by pt.PRODUCT_TASK_ID asc**
I know how to change SQL query (group by clause need to be there) but I don't know how to modify the Hibernate query in order to get the result.
You just need to use Projections's .groupProperty() method in your Criteria.
groupProperty
public static PropertyProjection groupProperty(String propertyName)
A grouping property value
Your code would be like this:
Integer countObj = (Integer) ht.findByCriteria(criteria.setProjection(Projections.rowCount()
.add(Projections.groupProperty("product_task_id"))))
.get(0);
I am using the following sql query in my java program:
SELECT COUNT(*) FROM event WHERE externaleventid ='1256294';
But I have an error as:
Invalid Column id.
Same query works fine in SQL Developer.
For some reason you are attempting to get a column named "externaleventid" from the query, but only "count(*)" is available. You shouldn't try to get back the where clause bind variables from the result set, you should get the actual data back from the result set, by column index or by column name.
Try rs.getInt(1) to get the data from the first column. Or, you can alias the column in the query, e.g. SELECT count(*) cnt FROM..., and you can refer to it by the aliased column name: rs.getInt("cnt").
I have added two columns in the sql to get the values through hibernate.My databse is oracle and those fields datatype i number. So i have created the beans with long and (tried Integer too) but when retrieving the values(executing the valuesquery).
Its giving me an error
org.hibernate.type.LongType - could not read column value from result set
java.sql.SQLException: Invalid column name
at oracle.jdbc.driver.OracleStatement.getColumnIndex(OracleStatement.java:3711)
at oracle.jdbc.driver.OracleResultSetImpl.findColumn(OracleResultSetImpl.java:2806)
at oracle.jdbc.driver.OracleResultSet.getLong(OracleResultSet.java:444)
at weblogic.jdbc.wrapper.ResultSet_oracle_jdbc_driver_OracleResultSetImpl.getLong(Unknown Source)
at org.hibernate.type.LongType.get(LongType.java:28)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:163)
at org.hibernate.type.NullableType.nullSafeGet(NullableType.java:189)
tABLE DEFINITION :
CREATE TABLE "PRODUCTLIST"
(
PRICELIST_PUBLISH_KEY decimal(22) NOT NULL,
PRODUCT_NBR varchar2(54) NOT NULL,
PRODUCT_KEY decimal(22),
PRODUCT_DESCRIPTION varchar2(360),
PRODUCT_FAMILY_NBR varchar2(30),
PRODUCT_FAMILY_DESCR varchar2(180),
PRODUCT_GROUP_NBR varchar2(30),
PRODUCT_GROUP_DESCR varchar2(180),
PRODUCT_LINE_NBR varchar2(30),
PRODUCT_LINE_DESCR varchar2(180),
PRODUCT_CLASS_CODE varchar2(6),
LAST_PP_GENERATED_DATE_KEY decimal(22),
LAST_PP_GENERATED_DATE date,
PUBLISH_PERIOD_KEY decimal(22) NOT NULL,
PUBLISH_PERIOD_DATE date,
PL_KEY decimal(22),
PRODUCTLIST varchar2(750),
SALES_KEY decimal(22),
PRODUCT varchar2(60),
DM_EXTRACTED_BY_USER varchar2(90)
)
sql :
Query query = session.createSQLQuery(channelQuery)
.addScalar("PRODUCT",Hibernate.STRING)
.addScalar("PRODUCTLIST",Hibernate.STRING)
.addScalar("PRODUCTKEY",Hibernate.LONG)
.addScalar("SALESKEY",Hibernate.LONG)
.setResultTransformer(Transformers.aliasToBean(SearchResult.class));
return query.list();
}
});
Please help me to fix the issue ?
In your table definition, I can't see all the fields you're using in the addScalar() methods: there are no PRODUCTKEY nor SALESKEY fields. Instead I can see a PRODUCT_KEY and a SALES_KEY fields (underscores). I think you should use the correct name of the fields in the addScalar() methods.
But if your query is the one you put in your comments, you have to correct some details:
you should use p instead of pub as alias for the table name. As there is only one table in the query, you can suppress the alias.
In your SELECT clause, p.productprice is not an existing field in your table. Maybe you want to use p.pricelist instead.
In your WHERE clause, p.productnbr is not an existing field in your table. You should use p.product_nbr instead.
Then you should change the field names in the addScalar() methods to match those you are using in the query.
Modified query
SELECT distinct p.product, p.productlist, p.PL_KEY, p.SALES_KEY
FROM productlist p
WHERE p.product_nbr in ('1002102')
Your code should be:
Query query = session.createSQLQuery(channelQuery)
.addScalar("PRODUCT",Hibernate.STRING)
.addScalar("PRODUCTLIST",Hibernate.STRING)
.addScalar("PL_KEY",Hibernate.LONG)
.addScalar("SALES_KEY",Hibernate.LONG)
.setResultTransformer(Transformers.aliasToBean(SearchResult.class));
return query.list();
If you define aliases in your query, then you can use the alias names instead of the field names. For example, with this query:
SELECT distinct p.product, p.productlist, p.PL_KEY as PRODUCTKEY, p.SALES_KEY as SALESKEY
FROM productlist p
WHERE p.product_nbr in ('1002102')
you can use the following code (it's your original code):
Query query = session.createSQLQuery(channelQuery)
.addScalar("PRODUCT",Hibernate.STRING)
.addScalar("PRODUCTLIST",Hibernate.STRING)
.addScalar("PRODUCTKEY",Hibernate.LONG)
.addScalar("SALESKEY",Hibernate.LONG)
.setResultTransformer(Transformers.aliasToBean(SearchResult.class));
return query.list();
I have a store program in java and a database made in access. I already have 2 tables in my database which are the customers table and the products table.
I want to add an orders table wherein it's primary key is an autonumber and an order_line table to complete this app. I want to have tables like this..
customer(cust_id, name, ....)
orders(order_no, cust_id, date_purchased,...)
order_line(order_no, product_id, ...)
products(product_id, product_name, price,....)
When the customer purchased the products, i could insert new values to the orders table. The thing that is not clear to me is how could i insert also in the order_line table, because the order_no I created in access is of type autonumber.
Would I make a select statement first to get the order_no value to put it to the order_no in order_line's table? Or I need to put this in one query only.
Anyone with experience to this? Any advice is appreciated.
The insertion into orders and order_line table should happen in a single transaction. While doing so, if you are using plain JDBC to insert record into orders table, you can register the order_no as an OUT parameter in your CallableStatement and get the value after the statement is executed and use to set the order_no attribute on the order_line records.
// begin transaction
connection.setAutoCommit(false);
CallableStatement cs = connection.prepareCall(INSERT_STMT_INTO_ORDERS_TABLE);
cs.registerOutParameter(1, Types.INT);
int updateCount = cs.execute();
// Check the update count.
long orderNo = cs.getInt(1);
// CallableStatement csLine for inserting into order_line table
// for (OrderLine line: orderLines) {
// Set the orderNo in line.
// set paramters on csLine.
// csLine.addBatch();
// }
// run the batch and verify update counts
connection.commit();
// connection.rollback() on error.
The JDBC-way (if you like database-independence), is to use the getGeneratedKeys() method of statement.
Use setAutoCommit(false), then execute the first query with the option Statement.RETURN_GENERATED_KEYS (eg for PreparedStatement).
Then use the getGeneratedKeys() method to retrieve the key (note: reference by column name, as the exact implementation and number of returned columns depends on the driver implementation.
And execute the second statement with that retrieved key.
Finally, commit().