Comparison of different SQL implementations
Instead, a MSSQL 2000-specific syntax was needed: SELECT TOP n columns FROM tablename ORDER BY key ASC The TOP construct is still available in MSSQL 2008, and it's handy for casual SQL work. Standard Optional feature T171 defines LIKE clause in table definition: CREATE TABLE t2 ( LIKE t1 ) The DBMS may support an extension of this (feature T173) which allows for more table properties to be copied: CREATE TABLE t2 ( LIKE t1 INCLUDING IDENTITY INCLUDING DEFAULTS INCLUDING GENERATED ) If INCLUDING DEFAULTS is not specified, column defaults will not be part of t2; likewise with IDENTITY and GENERATED properties
How to Delete Data From a DB2 Table and Release Disk Space - db2commerce.com
I used this method for the same delete I was running for about 7 million rows in the STAGLOG table, and it completed in less than an hour what had been taking days - so it's at least an order of magnitude faster. Reorg the Table After your delete is complete, assuming you're using AST tablespaces (DMS are similar), you will not see any change in the amount of space taken up in your filesystem
MySQL :: MySQL 5.1 Reference Manual :: 13.2.10 UPDATE Syntax
multi-table UPDATE retrieving more than 1 row for every row to be updated, will perform only 1 update with the first found value and wont send any message about following skipped values (I don't know if it should be called an error)3. The @rnk variable needs to be initialized, and the keyval variable (in this case @gedid or @snmid) needs to be set to a value that will not be matched by the first record
Create a Modified On Column in SQL Server - CodeProject
License This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) Share email twitter facebook linkedin reddit google+ About the Author james.wren United States No Biography provided You may also be interested in..
This ALTER will also cause any packages dependent on this table to be invalidated.So, what are the catches? What can't you do? Well first, you cannot alter a column in a table defined in a view. If you want them changed also, then you're going to have to go back and do it by hand.Like I said at the start, this is one of the less talked about changes in DB2 9 that I think will be very handy
Tables and Table Clusters
See Also: "User Accounts" and "Connection with Administrator Privileges" Oracle Database Administrator's Guide to learn about SYS, SYSTEM, and other administrative accounts Sample Schemas An Oracle database may include sample schemas, which are a set of interlinked schemas that enable Oracle documentation and Oracle instructional materials to illustrate common database tasks. For example, you can create a zone map on a table whose rows are naturally ordered on a set of columns, such as a stock trade table whose trades are ordered by time
DB2 ensures that the constraint is not violated during inserts and updates.Suppose that you add a column to the BOOKS table for a book type, and the values that you wish to allow are F (fiction) and N (nonfiction). A view essentially is a name for a stored query that you can use much like a table.For example, suppose that a company has a table containing information about its employees
FOR EACH ROW triggers are called once for each inserted, updated, or deleted row.QUEUE is implemented for syntax compatibility with HSQL and has no effect.The trigger need to be created in the same schema as the table. Currently, enabling this is experimental only.This is a global setting, which means it is not possible to open multiple databases with different modes at the same time in the same virtual machine
DB2 10 Universal Table Space - 2012-03-18 - no template
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The SQL Procedure: ALTER TABLE Statement
Indexes on Altered Columns When you alter the attributes of a column and an index has been defined for that column, the values in the altered column continue to have the index defined for them. Restriction: When defining overlapping primary key and foreign key constraints, the variables in a data file are part of both a primary key and a foreign key definition
CYCLE or NO CYCLE Specifies whether this identity column should continue to generate values after reaching either the maximum or minimum value of the sequence. Therefore, the value specified for CACHE also represents the maximum number of values for the identity column that could be lost during a system failure
The columns should have the same names, data types, null attributes, CCSIDs, subtypes, hidden attributes, and field procedures as the corresponding system-period temporal table. The basis of temporal tables: The periodThe period is defined as two columns where the first column represents the beginning of the period and the second column represents the end of the period
You certainly realize that changing a column from NULL to NOT NULL means you lose the null-indicator, while it may still be present in your unload-file
How to change the column name by using ALTER?
ALTER table table name rename column tocolumn name was changed but it's not giving entire table with altered column name.It's giving only the altered column
This parameter cannot be used with PROGRAM TYPE SUB, SECURITY USER, SECURITY DEFINER, LANGUAGE JAVA, and parameters with a LOB data type or distinct type based on a LOB data type. COMMIT ON RETURN NO (default) means that the UR is not to be committed upon successful return (non-negative SQLCODE) from the procedure or invocation of a UDF
The types of objects that can be created depends on which RDBMS is being used, but most support the creation of tables, indexes, users, synonyms and databases
Since I DID only have one Unique Constraint, I knew which one to drop, but if I had more, I wouldn't know how to decide which Unique Constraint to drop. My problem is that if I had more than one Unique Constraint on my table (luckily, I did not), I would not know which Constraint to drop in order to drop my problematic Index
mysql sql alter-table asked Jul 14 at 14:16 Spotlight 438314 -1 votes 3answers 28 views Alter table for add columns and constraints Hello i have this but it show error ERROR 1064 (42000) at line 61: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use ... mysql enums alter-table rds downtime asked Jul 9 at 4:08 Amit 11 6 votes 1answer 53 views MySql Script update on CodeIgniter I have trouble to put MySQL query to php Codeigniter
How can I drop a Column from a table? - DB2 Database
You can use the Control Center to drop a column, because it will generate commands to export the data, drop the table, recreate the table without the dropped column, and re-load the data
DB2: Convert existing column to identity - Stack Overflow
IBM Data Movement Tool does this automatically but if you are not using the tool and want a way to sync up start value of the identity column with the data in your database, you can use this stored procedure to sync the data. So far I am able to do so very easily with the following: alter table list alter column id set generated always as identity (start with 0); Unfortunately, I need it to start at the maximum number of the data that is already in the table
The result of the fullselect must provide a set of columns that match the columns in the existing table (same number of columns, same column definitions, and same names). We need to execute the DB2 LOAD utility to load values into this table in Test; however, the GENERATED ALWAYS clause forces DB2 to generate values for this column
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