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How do I list tables in a schema?

How do I list tables in a schema?

The easiest way to find all tables in SQL is to query the INFORMATION_SCHEMA views. You do this by specifying the information schema, then the “tables” view. Here’s an example. SELECT table_name, table_schema, table_type FROM information_schema.

How can I compare two table structures in Oracle?

Columns

1. table_name – name of the table with schema.
2. column_name – name of column.
3. schema_1 – if column exists in a table in schema 1 then column contains its name (repeats it from column column)
4. schema_2 – if column exists in a table in schema 2 then column contains its name (repeats it from column column)

How do I list all tables in a schema in SQL?

Then issue one of the following SQL statement:

1. Show all tables owned by the current user: SELECT table_name FROM user_tables;
2. Show all tables in the current database: SELECT table_name FROM dba_tables;
3. Show all tables that are accessible by the current user:

How do I compare schemas in Oracle SQL Developer?

Diff Report Steps

1. Open SQL Developer.
2. Create database connections to the DEV and TEST databases to be compared (highlighted in blue above).
3. Select Tools…
4. In the first step of the Diff Wizard select the Source and Destination connections.
5. In the second step of the Diff Wizard select the schema types to be compared.

What is a table schema?

Show 10 more comments. 138. A relation schema is the logical definition of a table – it defines what the name of the table is, and what the name and type of each column is. It’s like a plan or a blueprint.

How do I list all tables in postgresql?

Use the \dt or \dt+ command in psql to show tables in a specific database. Use the SELECT statement to query table information from the pg_catalog. pg_tables catalog.

How do you compare tables?

Below are some of the methods you can use to compare two tables in SQL.

1. Compare Two Tables using UNION ALL. UNION allows you to compare data from two similar tables or data sets.
2. Compare Two Table using MINUS.
3. Compare Two Table using JOIN.
4. Compare Two Table using NOT EXISTS.
5. Get Matched and Unmatched Count from Two Tables.

How can you tell if two tables have the same data?

1. Step 1 – Test for Duplicate Rows on TABLEA. If SELECT DISTINCT * FROM TABLEA.
2. Step 2 – Test for Duplicate Rows on TABLEB. If SELECT DISTINCT * FROM TABLEB.
3. Step 3 – INNER JOIN TABLEA to TABLEB on every column.

How do you compare two schemas?

To compare data by using the New Data Comparison Wizard

1. On the SQL menu, point to Data Compare, and then click New Data Comparison.
2. Identify the source and target databases.
3. Select the check boxes for the tables and views that you want to compare.

How does toad compare two schemas in Oracle?

Toad offers the Compare Schemas screen for that purpose. To launch the Compare Schemas screen, choose Main Menu → Database → Compare → Schemas. The screen shown in Figure 9.29 appears.

How to compare two schemas in Oracle Database?

Query below compares columns (names) in tables between two Oracle Database schemas. It shows columns missing in either of two databases. schema_2 – if column exists in a table in schema 2 then column contains its name (repeats it from column column) One row represents one distinct name of column in specific table.

How to List table names in Oracle schema?

A. List of tables in YOUR schema. select object_name as table_name from user_objects where object_type = ‘TABLE’ order by object_name. B. List of tables in SPECIFIC schema. select object_name as table_name from all_objects t where object_type = ‘TABLE’ and owner = ‘SCHEMANAME’ order by object_name.

How to compare two tables column by column in Oracle?

The same table with same columns (say 50 columns are is avlbl in two databases and two databases are linked. I want to compare these two tables column by column and find out which records are not matching. i want the specific column in each row in two tables that are not matching.

How to compare two tables of data Ask Tom?

SQL> set timing on SQL> set autot traceonly SQL> select id,’In table 1, not in table 2′ 2 from accounts 3 minus 4 select id,’In table 1, not in table 2′ 5 from accounts2 6 union 7 select id,’In table 2 not in table 1′ 8 from accounts2 9 minus 10 select id,’In table 2 not in table 1′ 11 from accounts 12 / 49 rows selected.