Step 1: Use the desktop icon to launch Oracle SQL Developer. Step 2: Select the Connections option under View. Step 3: Right-click Connections in the Connections tab and choose New Connection. You’ll see a window asking you to choose a new database connection. Step 4: Fill in the corr...
In this method, you can convert your Oracle data to a CSV file using SQL plus and then transform it according to the compatibility. You then can stage the files in S3 and ultimately load them into Snowflake using the COPY command. This method can be time taking and can lead to data in...
Oracle provides the different date and timestamp function and format to the user, we can convert timestamp to date as per user requirement, in oracle we can use alter table command or cast function for conversion purpose, oracle database handles the date format in a straightforward and simple ...
To find duplicate rows from thefruitstable, you first list the fruit name and color columns in bothSELECTandGROUP BYclauses. Then you count the number of appearances each combination appears with theCOUNT(*)function as shown below: SELECTfruit_name, color,COUNT(*)FROMfruitsGROUPBYfruit_name, c...
A new feature has been added in datapump of oracle 12c. We can import data with nologgin option i.e without generating logs. We sometimes face issue while importing big tables, as it generates lot of archive logs. TRANSFORM=DISABLE_ARCHIVE_LOGGING:Y– This parameter can be used to make th...
To find wait event of the query for which it is waiting for: SQL>select sql_id, state, last_call_et, event, program, osuser from v$session where sql_id='&sql_id'; To kill session in Oracle: https://orahow.com/4-best-ways-to-find-blocking-sessions-in-oracle-11g/...
Best Practices for Query Tuning in Oracle Tuning Oracle SQL isn’t just something to do at the outset—you need to revisit it regularly. Oracle SQL tuning can be complex and is generally intended to optimize your database to obtain all the information you need (rows and columns) with the ...
B-trees don't have this luxury. You can't just plonk one on top of the other to find what you're looking for. While Oracle Database can combine B-trees (via a "bitmap conversion from rowids"), this is relatively expensive. In general to get the same performance as the three ...
Converting to a String in Oracle SQL As with the NUMBER data type, there are two ways to convert a value to a string data type. The main string data types in Oracle are: CHAR NCHAR VARCHAR2 NVARCHAR2 TEXT TheTO_CHAR functiontakes a value and converts it to a TEXT data type. It wo...
Copied to Clipboard Error: Could not Copy select * except hire_date from hr.employees; ORA-00923: FROM keyword not found where expected But this is invalid syntax in Oracle Database! In this post we'll see how you can emulate this functionality. We'll cover: ...