How do I list all tables in Sybase database?
For example, the following statement queries the data dictionary table ALL_TABLES to retrieve all table names in the Sybase database: SQL> SELECT * FROM “ALL_TABLES”@SYBS; When a data dictionary access query is issued, the gateway: Maps the requested table, view, or synonym to one or more Sybase system table names.
What is update statistics in Sybase?
The update statistics commands create statistics, if there are no statistics for a particular column, or replaces existing statistics if they already exist. The statistics are stored in the system tables systabstats and sysstatistics.
What are system tables in Sybase?
System tables in all databases
| System table | Contents |
|---|---|
| sysqueryplans | Abstract query plans and SQL text. |
| sysreferences | One row for each referential integrity constraint declared on a table or column. |
| sysroles | Maps server-wide roles to local database groups. |
| syssegments | One row for each segment (named collection of disk pieces). |
How do you check DB statistics in SAP?
Choose Administration CCMS DB Administration Cost-based optimizer Create statistics . Alternatively, call transaction DB20. Enter the name of the table in Table (do not enter a generic name or pattern) and choose Refresh information to display information about current table statistics.
How can I get table column names and data types in Sybase?
You can use built-in procedure sp_columns. It will return all the table metadata including column name, data type, column length etc. for a given table.
How do I find out who owns a table in Sybase?
owner. table_name. Within Sybase, if you are the owner of a given table, you can refer to it as just table_name. If you are not the owner, you must refer to it with the owner of the table as a prefix.
What is reorg in Sybase?
reorg rebuild rebuilds the entire table, copying the data to new sets of pages, and rebuilds all indexes. You cannot use the reorg rebuild sub commands (for example, compact, reclaim_space, and forwarded_rows) on all-pages-locked tables.
How do I find tables in Sybase?
To get all tables, views, and system tables, the following Sybase system stored procedure can be executed.
- exec sp_tables ‘%’ To filter by database for tables only, for example master:
- exec sp_tables ‘%’, ‘%’, ‘master’, “‘TABLE'”
- exec sp_tables ‘%’, ‘dbo’, ‘master’, “‘TABLE'”
What is table statistics in SAP?
Accurate table statistics are essential for the SAP ASE optimizer to find an efficient query plan. Missing or outdated statistics can lead to an inefficient and slow query plan. Very complex SAP BW queries and the large amount of data in SAP BW fact tables tighten this problem.
What is update table statistics in systabstats?
The update table statistics is kind of a different beast. It doesn’t update the data in systabstats but only table or partition level statistics in sysstatistics i.e. it does not affect column level statistics.
Does SP_modifystats update the data in systabstats?
It doesn’t update the data in systabstats but only table or partition level statistics in sysstatistics i.e. it does not affect column level statistics. sp_modifystats is a system stored procedure which can be used to update density information for a table of a column group.
What is the update statistics command in SQL Server?
Using the update statistics command, you can update the statistics about the distribution of key values for a table, an index on the table, specific columns of the table or on partitions.
How to list all tables in the current database and their size?
Sybase ASE: List all tables in the current database and their size Posted on April 1, 2014 In order to get a list of all tables in the current database, you can filter the sysobjects table by type = ‘U’ e.g.: select convert (varchar (30),o.name) AS table_name from sysobjects o where type = ‘U’ order by table_name